{"title":"Bluelab","description":"\u003cp data-start=\"183\" data-end=\"239\" style=\"text-align: center;\"\u003e🔧 \u003cstrong data-start=\"186\" data-end=\"236\"\u003eBluelab – Built for Growers, Backed by Science\u003c\/strong\u003e 🔧\u003c\/p\u003e\n\u003cp data-start=\"241\" data-end=\"491\" style=\"text-align: center;\"\u003eFrom soil to hydro and everything in between, \u003cstrong data-start=\"287\" data-end=\"298\"\u003eBluelab\u003c\/strong\u003e delivers rock-solid tools that help you grow with precision. Designed \u003cem data-start=\"369\" data-end=\"394\"\u003eby growers, for growers\u003c\/em\u003e, their gear is tough, accurate, and made to thrive in the messy, hands-on world of real growing.\u003c\/p\u003e\n\u003cp data-start=\"493\" data-end=\"690\" style=\"text-align: center;\"\u003e📏 Whether you're checking \u003cstrong data-start=\"520\" data-end=\"526\"\u003epH\u003c\/strong\u003e, \u003cstrong data-start=\"528\" data-end=\"534\"\u003eEC\u003c\/strong\u003e, or fine-tuning your \u003cstrong data-start=\"556\" data-end=\"577\"\u003enutrient solution\u003c\/strong\u003e, Bluelab’s meters and monitors are your grow room’s best mate – built to last, easy to use, and always on point.\u003c\/p\u003e\n\u003cp data-start=\"692\" data-end=\"773\" style=\"text-align: center;\"\u003e💡 \u003cstrong data-start=\"695\" data-end=\"773\"\u003eDial it in. Trust your tools. Grow better – with Bluelab at The Grow Guys.\u003c\/strong\u003e\u003c\/p\u003e","products":[{"product_id":"ph-pen-by-bluelab","title":"Bluelab pH Pen by Bluelab — Waterproof pH \u0026 Temperature Meter for Hydroponics","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n  \u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab pH Pen is a waterproof, pocket-sized pH and temperature meter built for growers who check their reservoir every single day. It reads pH across the full 0.0–14.0 range to ±0.1 accuracy with automatic temperature compensation, calibrates to two reference points for maximum precision, and floats if you drop it in the res. One AAA battery, one year warranty, made in New Zealand by one of the most trusted names in hydroponics measurement.\u003c\/p\u003e\n\n  \u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003e±0.1 pH Accuracy\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eTight enough to catch the shifts that trigger nutrient lockout before your plants feel it.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eAuto Temperature Compensation\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003epH readings adjust automatically for water temperature — no manual correction needed.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eWaterproof \u0026amp; Floats\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eFully waterproof and buoyant. Drop it in the res during a busy feed and fish it back out.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eTwo-Point Calibration\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eCalibrate to two reference points for the kind of accuracy you can trust across the full pH range.\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\n  \u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n    \u003cdiv\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eBluelab\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003epH Measurement Range\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e0.0–14.0\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003epH Accuracy\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e±0.1\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e0°C–50°C\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eTemperature Compensation\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eAutomatic\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eCalibration\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eTwo-point\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eWaterproof\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eYes — floats\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eAuto-Off\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eYes\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eBattery\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e1x AAA (included)\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e1 year\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eMade in New Zealand\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n    \u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrower Tip\u003c\/strong\u003e\n    \u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n      \u003cli\u003eCalibrate at least once a week — pH probes drift over time and a poorly calibrated pen is worse than no pen at all. Use pH 7.0 buffer first, then pH 4.0 for a full two-point calibration.\u003c\/li\u003e\n      \u003cli\u003eAlways rinse the probe with clean water before dipping into a new solution. Cross-contaminating your nutrient solution with calibration buffer will throw off readings.\u003c\/li\u003e\n      \u003cli\u003eStore the probe in Bluelab Probe Care KCI storage solution when not in use — keeping the probe hydrated extends its lifespan significantly.\u003c\/li\u003e\n      \u003cli\u003eCheck pH daily during peak feeding cycles, particularly in DWC and NFT systems where pH can shift fast between feeds.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Use\u003c\/h2\u003e\n\n  \u003cdiv\u003e\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 0.875rem; padding: 0.75rem 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 0.0625rem;\"\u003e1\u003c\/span\u003e\n      \u003cdiv\u003eCalibrate before first use and at least weekly thereafter. Add pH 7.0 buffer solution to a clean cup, dip the probe, and press the calibration button. Repeat with pH 4.0 buffer to complete the two-point calibration.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 0.875rem; padding: 0.75rem 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 0.0625rem;\"\u003e2\u003c\/span\u003e\n      \u003cdiv\u003eRinse the probe tip with clean water, then dip it into your nutrient solution or reservoir. Wait a few seconds for the reading to stabilise on screen.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 0.875rem; padding: 0.75rem 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 0.0625rem;\"\u003e3\u003c\/span\u003e\n      \u003cdiv\u003eRecord both pH and temperature. Target 5.5–6.2 for hydroponic and coco systems, 6.0–7.0 for soil. If pH is out of range, adjust with pH Up or Down before watering.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 0.875rem; padding: 0.75rem 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 0.0625rem;\"\u003e4\u003c\/span\u003e\n      \u003cdiv\u003eRinse the probe with clean water after each use. Never wipe it dry — patting gently with a damp cloth is fine, but friction can scratch the probe membrane.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 0.875rem; padding: 0.75rem 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 0.0625rem;\"\u003e5\u003c\/span\u003e\n      \u003cdiv\u003eStore the probe in KCI storage solution when not in use — not tap water, not calibration buffer. Keeping it hydrated extends probe life and maintains calibration accuracy between sessions.\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\n  \u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n    \u003ca href=\"\/collections\/bluelab-1\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n      \u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab Conductivity Pen\u003c\/strong\u003e\n      \u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eCheck EC alongside pH for complete control over nutrient strength and uptake at every feed.\u003c\/p\u003e\n    \u003c\/a\u003e\n    \u003ca href=\"\/collections\/hydroponic-nutrients\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n      \u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eHydroponic Nutrients\u003c\/strong\u003e\n      \u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eEvery nutrient mix needs a pH check before it hits your plants. Keep the pen close.\u003c\/p\u003e\n    \u003c\/a\u003e\n    \u003ca href=\"\/collections\/environmental-monitors\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n      \u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eAll Environmental Monitors\u003c\/strong\u003e\n      \u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eBrowse the full range of Bluelab and other measurement tools for complete grow room monitoring.\u003c\/p\u003e\n    \u003c\/a\u003e\n  \u003c\/div\u003e\n\n  \u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFAQ\u003c\/h2\u003e\n\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow often should I calibrate the Bluelab pH Pen?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eCalibrate at least once a week under normal use. If you're checking solution multiple times daily, or if readings start looking inconsistent, calibrate more frequently. A drifted probe gives you false confidence — if you're not calibrating regularly, you may as well be guessing.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat calibration solutions do I need?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYou need pH 7.0 buffer solution and pH 4.0 buffer solution for a full two-point calibration. Always calibrate to pH 7.0 first, then pH 4.0. Bluelab calibration solutions are specifically formulated for Bluelab instruments and are the recommended choice.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the Bluelab pH Pen fully waterproof?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The Bluelab pH Pen is fully waterproof and will float if dropped in your reservoir. It's designed for use in wet hydroponic environments where brief submersion is a real possibility.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat does automatic temperature compensation mean?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003epH readings are affected by water temperature — the same solution reads differently at 18°C versus 28°C. Automatic temperature compensation (ATC) means the pen detects the water temperature in real time and adjusts its pH reading accordingly. You get an accurate pH reading regardless of solution temperature without any manual correction.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat pH range should I target in hydroponics?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eFor most hydroponic systems and coco coir, target 5.5–6.2 pH. For soil growing, 6.0–7.0 is generally the right window. Staying within these ranges keeps macro and micronutrients available for uptake — stray too far in either direction and you start seeing deficiency symptoms even when nutrients are present in solution.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow long does the battery last?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eBattery life varies with usage frequency, but the auto-off function activates after a period of inactivity to extend battery life significantly. One AAA battery typically lasts several months under regular daily use. A replacement AAA battery is available at any supermarket or hardware store.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n    \u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eYour Reservoir Deserves Accurate pH\u003c\/h2\u003e\n    \u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eBluelab pH Pen in stock now — made in New Zealand, backed by a 1-year warranty. Free shipping on orders over $499*\u003c\/p\u003e\n    \u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n      \u003cbutton id=\"btn-add-to-cart\" style=\"background: #4caf50 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n      \u003ca href=\"\/collections\/bluelab-1\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop All Bluelab\u003c\/a\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('49928107327786', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#388e3c';\n      setTimeout(function() { btn.textContent = 'Add to Cart'; btn.style.background = '#4caf50'; }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() { btn.textContent = 'Add to Cart'; btn.style.background = '#4caf50'; }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":49928107327786,"sku":"BLL-METER-PH-PEN","price":149.99,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/Bluelab-pH-Pen-by-Bluelab-Waterproof-pH-Temperature-Meter-for-Hydroponics.webp?v=1776901310"},{"product_id":"truncheon-ec-by-bluelab","title":"Truncheon (EC) by Bluelab","description":"\u003ch2 data-pm-slice=\"1 1 []\" style=\"text-align: center;\"\u003e\n\u003cspan\u003e💧 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eThe Indestructible EC Weapon for Hydro Heroes\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eIf you grow like a pro, you need gear that can keep up. The Bluelab Truncheon Nutrient Meter is built like a brick sh*thouse and fine-tuned for Hydroponics domination. Whether you're mixing your first batch or fine-tuning mid-bloom, this EC meter gives you rock-solid readings and zero fluff.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eSplash it. Drop it. Dunk it. This beast won’t quit. Trusted by serious growers worldwide - and proudly stocked by your mates at The Grow Guys.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🔹 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e📊 Measures EC, CF, PPM (500 \u0026amp; 700 scale)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🔢 Reads up to 3.6 EC \/ 36 CF \/ 1800 ppm (500) \/ 2520 ppm (700)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🔦 Bright LED readouts for easy checks\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e💪 Built tough — waterproof, drop-resistant, and long-form for deep res testing\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🚪 No calibration needed — plug, dip, and go\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🔩 Five-year warranty for long-term peace of mind\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🛠️ \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHow to Use It\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eJust dip the Truncheon into your solution and the LED indicators light up with your EC levels. Rinse after use and store it somewhere dry. No buttons, no settings - just accurate data with zero faff.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🌟 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eGrow Guys Tips\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eUse it every time you mix or top up your res. It's perfect for preventing salt build-up and keeping your nutes right in the sweet spot. Pair it with the Bluelab pH Pen and you’ll be running a pro-grade grow room.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🍼 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eHydro growers who take feeding seriously. Ideal for DWC, RDWC, flood and drain, coco, and more. If your plants drink it, measure it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e📦 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSpecs \u0026amp; Stuff\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul data-spread=\"false\" style=\"text-align: center;\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEC range: 0.2 to 3.6 EC\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePPM: 140 to 2520 (700), 100 to 1800 (500)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCF range: 2 to 36\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFully waterproof\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAutomatic on\/off function\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eNo calibration needed\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMade in New Zealand\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e5-year warranty\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🚀 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eTough Gear. Clean Feeds. Better Yields.\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eAdd the Truncheon to your grow toolkit and feed with confidence. Big \u003cem\u003eFlowers\u003c\/em\u003e start with balanced nutes - this beast makes sure they get ‘em.\u003c\/span\u003e\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":50261788950826,"sku":"BLUELAB-TRUNCHEON","price":180.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/Truncheon-EC-by-Bluelab.jpg?v=1750058622"},{"product_id":"one-pen-by-bluelab-1","title":"OnePen by Bluelab — pH, EC \u0026 Temperature in One Meter","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab OnePen measures pH, conductivity (EC) and temperature from a single probe — one dip covers the whole reservoir check. It reads to two decimal places with ±0.05 pH accuracy, shows two parameters on screen at once, syncs to the Edenic app over Bluetooth, and when the probe eventually wears out you replace the probe, not the pen. IP68 waterproof and built for real grow rooms.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eThree Readings, One Probe\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003epH, EC and temperature from a single probe tip, with dual on-screen display — cycle between pH\/Temp, EC\/Temp and EC\/pH modes with one button.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eLab-Grade Accuracy\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003e±0.05 pH and ±0.1 EC with readings to two decimal places — precise enough to catch drift before your plants do.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eBluetooth + Edenic App\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003ePairs with Bluelab's free Edenic app to record, store, categorise and share every measurement — your feed log builds itself.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eReplaceable Probe\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eProbe health and calibration indicators on screen, and when the probe ages out you swap in a new one instead of binning a $395 meter.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMeasures:\u003c\/strong\u003e pH, conductivity (EC) and temperature\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH:\u003c\/strong\u003e 0.0 – 14.0 pH, ±0.05 at 25°C, two-decimal readings\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConductivity:\u003c\/strong\u003e 0 – 10.0 EC, ±0.1 EC — displays EC, CF, ppm 500, ppm 700 or mS\/cm\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e 0 – 50°C, ±1°C, °C or °F, automatic temperature compensation\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eModes:\u003c\/strong\u003e pH\/Temp, EC\/Temp, EC\/pH, plus mV\/Temp via Edenic\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProbe:\u003c\/strong\u003e Replaceable — double-junction pH, titanium EC electrodes (Bluelab OnePen Replacement Probe)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnectivity:\u003c\/strong\u003e Bluetooth to the Bluelab Edenic app\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIndicators:\u003c\/strong\u003e Calibration status, probe health, probe replacement, low battery\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWaterproof Rating:\u003c\/strong\u003e IP68 dustproof and waterproof\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e High-contrast backlit LCD, dual readout, auto-off to save battery\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 2 x AAA batteries\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2 years pen \/ 6 months probe\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — Hydrate the Bulb, Not the Electrodes\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eBefore first calibration, hydrate the pH glass bulb for 24 hours: a few drops of KCl storage solution on the sponge inside the storage cap, cap fitted. A dehydrated bulb drifts, reads stuck near pH 7 and can break.\u003c\/li\u003e\n\u003cli\u003eDo not soak the titanium EC electrodes in KCl for any length of time — Bluelab warns against it. The cap-sponge method hydrates the bulb without bathing the electrodes.\u003c\/li\u003e\n\u003cli\u003eNever use RO, distilled or deionised water on the probe, and clean with Bluelab pH Probe Cleaner only — Bluelab's Conductivity Probe Cleaner is not compatible with the OnePen.\u003c\/li\u003e\n\u003cli\u003eThe calibration check mark flashes after 30 days as your recalibration reminder — keep fresh pH 7.0 and 4.0 sachets on hand.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Use — First Use Setup\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHydrate for 24 hours.\u003c\/strong\u003e Place a few drops of KCl storage solution on the sponge inside the storage cap, fit the cap and leave for 24 hours so the glass bulb is active. Never use RO, distilled or deionised water, and don't soak the titanium electrodes in KCl.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCalibrate pH — always 7.0 first.\u003c\/strong\u003e Press O to turn on, select pH\/Temp mode with the CAL button, place the probe in fresh pH 7.0 solution and hold CAL until \"CAL\" displays. Wait for \"PASS PH7\".\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eThen pH 4.0 or 10.0.\u003c\/strong\u003e Rinse the probe in fresh tap water, shake off the excess, place it in pH 4.0 (or 10.0) solution and repeat. Both points are required — the check mark and calibrated-point icons confirm success. EC is factory calibrated.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMeasure.\u003c\/strong\u003e Dip the probe into your nutrient solution or reservoir, wait for the readings to stabilise, and cycle modes with the CAL button to see pH, EC and temperature. Pair with the Edenic app to log every reading automatically.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStore wet.\u003c\/strong\u003e Rinse in fresh tap water after use and refit the storage cap. Top up the cap sponge with a few drops of KCl regularly so the bulb never dries out.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/products\/bluelab-onepen-replacement-probe\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eOnePen Replacement Probe\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eKeep a spare on the shelf — probes average around 18 months of life, and a swap restores full accuracy in minutes.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration \u0026amp; pH Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH 7.0 and 4.0 sachets, KCl storage solution and pH adjusters — everything the OnePen needs to stay accurate.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/wi-fi-guardian-by-bluelab\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab Wi-Fi Guardian\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eComplement manual pen checks with 24\/7 continuous monitoring and remote alerts on the same parameters.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFAQ\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes the OnePen measure pH and EC at the same time?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The dual display shows two parameters at once — cycle between pH\/Temp, EC\/Temp and EC\/pH modes with the CAL button, all from a single probe dip.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the Bluelab OnePen waterproof?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. It carries an IP68 dustproof and waterproof rating, built for wet grow rooms and reservoir work.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need to soak the probe before first use?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Bluelab recommends hydrating the pH glass bulb for 24 hours before initial calibration — a few drops of KCl storage solution on the sponge inside the storage cap. Don't soak the titanium EC electrodes in KCl, and never use RO, distilled or deionised water.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow often should I calibrate the OnePen?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThe pen tracks it for you — the calibration check mark flashes 30 days after your last successful pH calibration. Always calibrate pH 7.0 first, then 4.0 or 10.0; EC is factory calibrated.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes the OnePen read in ppm as well as EC?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Conductivity can be displayed as EC, CF, ppm 500, ppm 700 or mS\/cm, so it matches whichever scale your feed chart uses.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I replace just the probe rather than buying a new pen?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The OnePen uses the genuine Bluelab OnePen Replacement Probe — a tool-free swap that restores pH, EC and temperature accuracy. Note the pen only accepts genuine Bluelab probes; imitations are rejected with a \"PROBE INVALID\" error.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it connect to my phone?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The OnePen pairs over Bluetooth with Bluelab's free Edenic app to record, store, categorise and share measurements — handy for tracking reservoir trends across a full crop cycle.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eOne Pen. Three Readings. No Compromises.\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eThe full reservoir check in one dip — shipped fast Australia-wide.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/bluelab-1\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eView All Bluelab\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('50265391137066', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":50265391137066,"sku":"BL-MTR-PEN-ONE","price":395.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/One-Pen-by-Bluelab-pH-EC-Temperature-in-One-Meter.png?v=1776901519"},{"product_id":"wi-fi-guardian-by-bluelab","title":"Wi-Fi Guardian by Bluelab — Remote pH, EC \u0026 Temperature Monitor","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab Wi-Fi Guardian is a continuous monitoring unit for growers who need eyes on their reservoir around the clock. It measures pH, EC\/conductivity, and temperature simultaneously and pushes live data to the Bluelab Connect app — so you can track trends, get alerts, and act before a drift becomes a problem, whether you are standing in the grow room or not.\u003c\/p\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eContinuous pH Monitoring\u003c\/strong\u003e \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eTracks pH around the clock so drift is caught immediately rather than at your next manual check.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eEC \u0026amp; Conductivity Tracking\u003c\/strong\u003e \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eMonitors nutrient solution strength in real time so you always know what your plants are being fed.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eRemote Access via Wi-Fi\u003c\/strong\u003e \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eConnects to the Bluelab Connect app for live data, historical logs, and customisable push alerts to your phone.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eTemperature Measurement\u003c\/strong\u003e \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eReads solution or ambient temperature alongside pH and EC — everything you need in one wall-mountable unit.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 1.1rem; font-weight: bold; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\u003cstrong\u003eMeasurements\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003epH, EC\/Conductivity, Temperature\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003epH Range\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e0.0 – 14.0 pH\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eEC Range\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e0.0 – 10.0 EC (0 – 100 CF)\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e0°C – 50°C (32°F – 122°F)\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eConnectivity\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eWi-Fi 2.4 GHz, Bluelab Connect App\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eData Logging\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eYes — cloud-based via Bluelab Connect\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eAlerts\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eCustomisable high\/low push notifications\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eAC adapter (included)\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eSG-S1358\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrower Tip\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eCalibrate your pH probe weekly using Bluelab pH 4.0 and 7.0 solutions — a calibrated probe is the difference between reliable data and guessing.\u003c\/li\u003e\n\u003cli\u003eSet your app alerts to trigger 0.3 pH units outside your target range so you get early warning without constant phone-checking.\u003c\/li\u003e\n\u003cli\u003eStore the probe tip in Bluelab KCl probe storage solution when not submerged — a dry probe degrades fast.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 1.1rem; font-weight: bold; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Use\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCalibrate the pH probe\u003c\/strong\u003e — Before first use, calibrate using Bluelab pH 4.0 then 7.0 solutions. The Guardian walks you through it step by step.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSubmerge the probe\u003c\/strong\u003e — Place the pH probe into your nutrient reservoir and secure the unit in a stable position within cable reach.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnect to Wi-Fi\u003c\/strong\u003e — Open the Bluelab Connect app and follow the setup wizard to connect the Guardian to your 2.4 GHz network.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSet alert thresholds\u003c\/strong\u003e — Program your high and low limits for pH, EC, and temperature in the app to match your crop's target parameters.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMonitor remotely\u003c\/strong\u003e — Check live readings and historical trends from anywhere via the Bluelab Connect dashboard on your phone.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e6\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMaintain the probe\u003c\/strong\u003e — Recalibrate weekly and store the probe tip in KCl storage solution when not in use to extend its working life.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 1.1rem; font-weight: bold; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem; margin-top: 2rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/collections\/bluelab-1\/products\/ph-calibration-solution-by-bluelab\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab pH Calibration Solution\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH 4.0 and 7.0 buffer solutions for weekly calibration. Non-negotiable if you want accurate readings.\u003c\/p\u003e\n\u003c\/a\u003e\u003ca href=\"\/collections\/bluelab-1\/products\/truncheon-ec-by-bluelab\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab Truncheon EC Meter\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eCross-check your reservoir EC manually with the industry-standard Truncheon when you want a second opinion.\u003c\/p\u003e\n\u003c\/a\u003e\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003epH Control \u0026amp; Calibration\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eBrowse pH Up, pH Down, and calibration essentials to complete your water control setup.\u003c\/p\u003e\n\u003c\/a\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 1.1rem; font-weight: bold; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes the Wi-Fi Guardian work with 5 GHz Wi-Fi?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The Wi-Fi Guardian operates on 2.4 GHz networks only. Make sure your router has a 2.4 GHz band active and connect to that band during setup.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I monitor multiple grow rooms from one Bluelab Connect account?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The Bluelab Connect app supports multiple devices under a single account, making it easy to manage several reservoirs or grow spaces from one dashboard.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it keep working if my internet goes down?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo — remote alerts, logging, and app access all require an active internet connection. The unit will continue displaying live readings locally if Wi-Fi drops, but cloud functions pause until connectivity is restored.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow long does the pH probe last?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eWith regular calibration and proper storage in KCl probe care solution, Bluelab probes typically last 12–18 months. Replacement probes are available separately and use a standard BNC connection.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the Bluelab Connect app free?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The Bluelab Connect app is free to download and use. There is no subscription required to access monitoring, alerts, or data logging features.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eKnow What Is Happening In Your Reservoir 24\/7\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eReal-time pH, EC, and temperature — from anywhere. Stop guessing, start growing with confidence.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #4caf50 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e \u003ca href=\"\/collections\/bluelab-1\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eView All Bluelab\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n  \n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('50265401819434', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#388e3c';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#4caf50';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#4caf50';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":50265401819434,"sku":"SG-S1358","price":549.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/Wi-Fi-Guardian-by-Bluelab-Remote-pH-EC-Temperature-Monitor.png?v=1776901527"},{"product_id":"ph-calibration-solution-by-bluelab","title":"pH Calibration Solution by Bluelab - 4.0 \u0026 7.0 Standard","description":"\u003ch2 data-pm-slice=\"1 1 []\" style=\"text-align: center;\"\u003e\n\u003cspan\u003e🧪 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStay Accurate, Stay Ahead\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eIf you want your Bluelab pH Pen or meter to give you accurate results time after time, you’ve got to show it a little TLC. That means regular cleaning and calibration - and these pH Calibration Solutions (4.0 \u0026amp; 7.0) are the exact tools for the job.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eNo guesswork, no drama - just a few minutes of maintenance for months of reliable readings. Whether you're dialling in feeds or troubleshooting lockout, calibration keeps your numbers (and your plants) bang on.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🔹 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e⚗️ 4.0 and 7.0 pH reference standards\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🔬 Compatible with all Bluelab pH pens and meters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e💧 Essential for monthly calibration and cleaning\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🧴 Available in 250ml or 500ml bottles\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🛠️ \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHow to Use It\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eAfter cleaning your pH probe, calibrate using 4.0 and 7.0 solutions as your reference points. Just follow the Bluelab instructions (same across all models). Calibrate monthly or whenever your meter tells you it's time - and always after cleaning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🌟 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eGrow Guys Tips\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eDon’t wait for your readings to drift. Make calibration part of your regular grow routine. Keep your calibration solution bottles sealed tight and uncontaminated for best results.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🧪 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eAnyone using a Bluelab pH meter or pen - whether you're growing in coco, hydro, or soil. Accurate pH means efficient nutrient uptake, and this stuff keeps you locked in.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e📦 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSpecs \u0026amp; Stuff\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul data-spread=\"false\" style=\"text-align: center;\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eTypes: 4.0 \u0026amp; 7.0 pH solutions\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSizes: 250ml, 500ml\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eShelf-stable when sealed\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eUse for calibration after every clean\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompatible with all Bluelab pH products\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🚀 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eClean Probes, Clean Data, Clean Grows\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eGrab a bottle (or two) and keep your meters running like clockwork. Your plants will thank you - and so will your yield.\u003c\/span\u003e\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Singular \/ 4.0 \/ 18ml","offer_id":50363001372970,"sku":"BLUELAB-CAL-SOL-4-18ml","price":2.95,"currency_code":"AUD","in_stock":true},{"title":"Singular \/ 4.0 \/ 250ml","offer_id":50363001405738,"sku":"BLUELAB-CAL-SOL-4-250ml","price":20.95,"currency_code":"AUD","in_stock":true},{"title":"Singular \/ 4.0 \/ 500ml","offer_id":50363001438506,"sku":"BLUELAB-CAL-SOL-4-500ml","price":39.95,"currency_code":"AUD","in_stock":false},{"title":"Singular \/ 7.0 \/ 18ml","offer_id":50363001471274,"sku":"BLUELAB-CAL-SOL-7-18ml","price":2.95,"currency_code":"AUD","in_stock":true},{"title":"Singular \/ 7.0 \/ 250ml","offer_id":50363001504042,"sku":"BLUELAB-CAL-SOL-7-250ml","price":20.95,"currency_code":"AUD","in_stock":true},{"title":"Singular \/ 7.0 \/ 500ml","offer_id":50363001536810,"sku":"BLUELAB-CAL-SOL-7-500ml","price":39.95,"currency_code":"AUD","in_stock":false},{"title":"Pair \/ 4.0 \u0026 7.0 \/ 18ml","offer_id":50363001569578,"sku":"BLUELAB-CAL-SOL-P-18ml","price":5.75,"currency_code":"AUD","in_stock":true},{"title":"Pair \/ 4.0 \u0026 7.0 \/ 250ml","offer_id":50363001602346,"sku":"BLUELAB-CAL-SOL-P-250ml","price":39.95,"currency_code":"AUD","in_stock":true},{"title":"Pair \/ 4.0 \u0026 7.0 \/ 500ml","offer_id":50363001635114,"sku":"BLUELAB-CAL-SOL-P-500ml","price":77.5,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/pH-Calibration-Solution-by-Bluelab-4_0-7_0-Standard.png?v=1752734001"},{"product_id":"pulse-multimedia-ec-mc-meter-by-bluelab","title":"Pulse Multimedia EC\/MC Meter by Bluelab - Bluetooth Soil Sensor","description":"\u003ch2 data-pm-slice=\"1 1 []\" style=\"text-align: center;\"\u003e\n\u003cspan\u003e🌿 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eKnow What Your Roots Know\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eNo more guessing games or finger-dip tests – the Bluelab Pulse Meter tells you exactly what's going on in the root zone. Moisture, EC, and temp readings all in one slick device, straight to your phone via Bluetooth. Deep probe, fast results, big grower energy.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🔹 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🔥 Instantly measures moisture, conductivity (EC), and temperature\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🧪 Rugged 8” stainless steel probes reach deeper into your media\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e🔄 Pairs with the Bluelab Pulse app for live tracking and analysis\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🛠️ \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHow to Use It\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eJust plunge the probes into your growing media and tap the button – the Pulse does the rest. It gives quick visual LED alerts and syncs to the Bluelab Pulse app so you can log, compare, and tweak your grow without breaking a sweat.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eHeads up: Not suitable for chunky media like perlite or compressible stuff like rockwool.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🌟 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eGrow Guys Tips\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eWant the cleanest reads? Moisten your media before poking. And always insert the probe slowly – you’re checking roots, not making compost kebabs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🧓 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eSoil growers, coco heads, and hydro legends who need quick, accurate reads without pouring and praying. Whether you're running drip, flood and drain, or hand-watering, this meter keeps your root zone dialled in.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cspan\u003e📦 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSpecs \u0026amp; Stuff\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul data-spread=\"false\" style=\"text-align: center;\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMeasures: EC (0.0 – 5.0 EC), temperature (0°C – 60°C), moisture (0-100%)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProbe Length: 200mm stainless steel\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eConnectivity: Bluetooth via Bluelab Pulse app (iOS \u0026amp; Android)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompatible Substrates: Soil, coco, other fine media\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eNot suitable for: Perlite, Rockwool\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\n\u003cspan\u003e🚀 \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSmarter Roots, Bigger Fruits\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eDitch the guesswork and dial in your grow like a legend. Add the Pulse to your toolkit and start growing with confidence today!\u003c\/span\u003e\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":50399698813226,"sku":"BLPULSE","price":495.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/Pulse-Multimedia-ECMC-Meter-by-Bluelab-Bluetooth-Soil-Sensor.png?v=1752734231"},{"product_id":"bluelab-ph-controller-no-wifi","title":"Bluelab pH Controller — Automatic pH Dosing \u0026 Monitoring (No Wi-Fi)","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n  \u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003e\n    One unit. Brand new, old stock. The Bluelab pH Controller is the set-and-forget wall-mounted pH dosing unit that ran grow rooms around the world for years before Bluelab replaced it with a Wi-Fi version. It automatically monitors your reservoir pH 24\/7 and doses pH Up or Down as needed via a built-in peristaltic pump — no phone required, no app to configure, no cloud dependency. Just plug it in, set your target pH, and walk away. If you've been after hands-free pH control without paying for connectivity you don't want, this is it. Includes the Bluelab pH probe and temperature probe — ready to go.\n  \u003c\/p\u003e\n\n  \u003c!-- CLEARANCE NOTICE --\u003e\n  \u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n    \u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eOne Unit Available — What You Need to Know\u003c\/strong\u003e\n    \u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n      \u003cli\u003eThis is old stock of the discontinued non-Wi-Fi Bluelab pH Controller. Brand new, never used, still in original packaging.\u003c\/li\u003e\n      \u003cli\u003eBluelab has replaced this model with the pH Controller Wi-Fi (currently $1050 new). This unit is $649.95 — a $400.05 saving for growers who don't need app connectivity.\u003c\/li\u003e\n      \u003cli\u003eThis product is no longer manufactured. Bluelab's online support page for this specific model is no longer active, and the manufacturer's warranty does not apply to old stock sold through a retailer after the product has been discontinued. Buy with that in mind.\u003c\/li\u003e\n      \u003cli\u003eReplacement pH probes and temperature probes are still available from Bluelab and stocked by us — the probe accessories for this controller use a standard BNC connection compatible with current Bluelab probes.\u003c\/li\u003e\n      \u003cli\u003eOnce it's gone, it's gone. We won't be restocking this model.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- BENEFIT CARDS --\u003e\n  \u003cdiv style=\"display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-bottom: 2rem; width: 100%; box-sizing: border-box;\"\u003e\n\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFully Automatic pH Dosing\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eSet your target pH and the controller doses Up or Down automatically via the built-in peristaltic pump. No manual intervention needed between checks.\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eNo Wi-Fi. No App. No Dependency.\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eWorks entirely standalone. Nothing to connect, no account to create, no service that can go offline. It just runs — every hour of every day.\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eOverdose Protection Built In\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eDosing lockouts and high\/low alarms prevent runaway dosing. If pH doesn't respond after repeated doses, the controller locks out and alerts you.\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eProbes Included\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eComes with both the Bluelab double junction pH probe and the temperature probe for automatic temperature compensation. Nothing extra to buy to get started.\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eHandles Up to 760L Reservoirs\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eRated for reservoirs up to 200 US gal \/ 760 L. Suitable for serious hobby grows and small commercial setups running a single recirculating reservoir.\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n      \u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eAuto-Resume After Power Loss\u003c\/strong\u003e\n      \u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eRestarts dosing automatically after a power interruption. Your settings are retained and the controller picks up where it left off without manual reset.\u003c\/span\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- SPECS --\u003e\n  \u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\n  \u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n    \u003cdiv\u003e\u003cstrong\u003eReservoir Capacity\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eUp to 200 US gal \/ 760 L\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eDosing Direction\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003epH Up (alkali) or pH Down (acid) — select one\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003ePump Type\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eBuilt-in peristaltic pump (replaceable)\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eDosing Tube\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e4 m acid\/alkali resistant tube included\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eGreen backlit LCD, adjustable brightness\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eAlarms\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eFlashing high\/low pH alarm with control lockout\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eDosing Lockout\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eYes — prevents over-dosing\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003ePower Loss\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eAuto-resume dosing on restart\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eCalibration\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eSimple push-button with on-screen guide\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003epH Probe\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eReplaceable double junction pH probe (included)\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eTemp Probe\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eBluelab Temperature Probe for ATC (included)\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eConnectivity\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eNone — standalone operation only\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eMount\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eWater resistant, wall mount design\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eInternational power supply (AU plug compatible)\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eDosing solution\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eUse with undiluted Bluelab pH Up or Down\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eBrand new — discontinued old stock\u003c\/div\u003e\n    \u003cdiv\u003e\u003cstrong\u003eManufacturer warranty\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eNot applicable (discontinued product)\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- HOW TO USE --\u003e\n  \u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Set Up the Bluelab pH Controller\u003c\/h2\u003e\n\n  \u003cdiv\u003e\n\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\n      \u003cdiv\u003e\n\u003cstrong\u003eWall mount and position probes\u003c\/strong\u003e — Mount the controller on a wall or stable surface within cable reach of your reservoir. Both the pH probe and temperature probe need to sit in the nutrient solution. Position the controller so the display is easy to read at a glance.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\n      \u003cdiv\u003e\n\u003cstrong\u003eRoute the dosing tube\u003c\/strong\u003e — Feed one end of the 4 m acid\/alkali resistant dosing tube into your pH Up or pH Down stock solution container. Route the other end so it drips above the maximum solution level of your reservoir — never submerged. Cut to length as needed.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\n      \u003cdiv\u003e\n\u003cstrong\u003eCalibrate the pH probe\u003c\/strong\u003e — Before first use, calibrate using the push-button calibration with on-screen guide. You'll need pH 4.0 and 7.0 buffer solutions. The controller walks you through each step — it's a simple two-point calibration, same as any Bluelab device.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\n      \u003cdiv\u003e\n\u003cstrong\u003eSet your target pH and dose timing\u003c\/strong\u003e — Use the menu to program your desired pH setpoint, and set your Dose On and Dose Off times. Dose On controls how long the pump runs per dose cycle; Dose Off controls the gap between doses to allow for mixing. Start conservative — it's easier to increase dosing than to undo an overdose.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\n      \u003cdiv\u003e\n\u003cstrong\u003eSet your alarm thresholds\u003c\/strong\u003e — Program your high and low pH alarm limits. If pH drifts outside these limits, the controller flashes an alarm and locks out dosing to protect your reservoir. Check the controller whenever the alarm triggers rather than leaving it unattended.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n      \u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e6\u003c\/span\u003e\n      \u003cdiv\u003e\n\u003cstrong\u003eMonitor and maintain\u003c\/strong\u003e — Calibrate the pH probe monthly using Bluelab-compatible buffer solutions. Keep the probe tip wet when not in use. Replace the dosing tube when it shows signs of wear or discolouration. Use undiluted Bluelab pH Up or Down in the stock container — diluted solutions can cause underdosing and inconsistent response.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- PAIRS WITH --\u003e\n  \u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem; margin-top: 2rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\n  \u003cdiv style=\"display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-bottom: 2rem; width: 100%; box-sizing: border-box;\"\u003e\n\n    \u003ca href=\"\/products\/ph-calibration-solution-by-bluelab\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n      \u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab pH Calibration Solution\u003c\/strong\u003e\n      \u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH 4.0 and 7.0 buffer solutions for 2-point calibration. Calibrate monthly to keep the controller reading and dosing accurately. Always use fresh, sealed buffer.\u003c\/p\u003e\n    \u003c\/a\u003e\n\n    \u003ca href=\"\/products\/ph-up-and-down-by-growth-technology\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n      \u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003epH Up \u0026amp; Down by Growth Technology\u003c\/strong\u003e\n      \u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe dosing solution that feeds the controller's pump. Use undiluted, as specified by Bluelab. Keep a good volume in stock — the controller will use it steadily.\u003c\/p\u003e\n    \u003c\/a\u003e\n\n    \u003ca href=\"\/products\/ph-down-by-growth-technology\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n      \u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003epH Down by Growth Technology\u003c\/strong\u003e\n      \u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eMost recirculating systems drift alkaline over time, so pH Down is typically the more heavily used of the two. Keep a spare bottle on hand to avoid running dry mid-cycle.\u003c\/p\u003e\n    \u003c\/a\u003e\n\n    \u003ca href=\"\/collections\/bluelab-1\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n      \u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eMore Bluelab Products\u003c\/strong\u003e\n      \u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eBrowse our full Bluelab range — meters, monitors, EC tools, and calibration accessories. Bluelab replacement probes use a standard BNC connection compatible with this controller.\u003c\/p\u003e\n    \u003c\/a\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- FAQ --\u003e\n  \u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eThis product is discontinued — is it still worth buying?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes, if you don't need Wi-Fi connectivity. The controller itself is brand new and fully functional — the only thing that's discontinued is the product line. The core hardware is the same reliable Bluelab dosing system that ran grow rooms for years. Replacement pH probes and temperature probes remain available through Bluelab's current parts range, both from us and directly from Bluelab, as the BNC probe connection is standard across their current product line. What you lose is the manufacturer warranty pathway and any future firmware or software support — neither of which apply to a standalone controller with no connectivity anyway.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat is the difference between this and the current Bluelab pH Controller Wi-Fi?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThe current Wi-Fi model adds remote monitoring and control via the Edenic app, a variable speed pump, and Bluetooth connectivity. This unit has none of that — it operates entirely standalone with a fixed-speed peristaltic pump and on-device controls only. If you want to check pH from your phone or receive alerts remotely, you need the Wi-Fi model at $1050. If you want automatic pH dosing without any connectivity, this does the same core job for $400 less.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes this control pH Up and pH Down at the same time?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo — this controller doses in one direction only, either Up or Down, which you set during initial programming. Most recirculating hydroponic systems drift alkaline over time, so the majority of growers run it configured for pH Down dosing. If your system actually needs two-way correction, this unit won't suit you — you'd need a dual-channel controller instead.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat pH Up or Down solution should I use with it?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eBluelab specifies using undiluted Bluelab pH Up or Down in the stock container. Using diluted solutions or alternative brands can cause underdosing and inconsistent pH correction, which undermines the whole point of a controller. We stock Growth Technology pH Up and Down, which is high-concentration and performs well — but follow Bluelab's guidance and use it undiluted.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I replace the pH probe when it eventually wears out?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes — the pH probe on this controller uses a standard BNC connection, which is compatible with Bluelab's current replacement pH probes. These are still actively manufactured and available. The temperature probe is also still available as a Bluelab spare part. This is one of the reasons Bluelab equipment holds its value — probe replacement extends the life of the device significantly rather than forcing a full replacement.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow many units are available?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eOne. This is old stock clearance — a single brand new unit. Once it sells, this listing will be removed. We won't be restocking the non-Wi-Fi model as it is no longer manufactured.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n    \u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs there a warranty on this unit?\u003c\/summary\u003e\n    \u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo manufacturer warranty applies. Bluelab's warranty does not extend to discontinued products sold as old stock through a retailer. The unit is brand new and untested — if you receive something that is dead on arrival or clearly defective out of the box, contact us directly and we'll work through it with you. But we're being upfront: standard warranty coverage does not apply here, and that's reflected in the price.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- CTA BLOCK --\u003e\n  \u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n    \u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eAutomatic pH. No App Required.\u003c\/h2\u003e\n    \u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eOne unit. Brand new. $400 less than the current Wi-Fi model for growers who just want it to work without pulling out their phone. When it's gone, it's gone.\u003c\/p\u003e\n    \u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n      \u003cbutton id=\"btn-add-to-cart\" style=\"background: #4caf50 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n      \u003ca href=\"\/collections\/bluelab-1\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eBrowse All Bluelab\u003c\/a\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('51379641024810', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#388e3c';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#4caf50';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#4caf50';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":51379641024810,"sku":"BL-CTRL-PH-NOWIFI","price":649.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/Bluelab-pH-Controller-Automatic-pH-Dosing-Monitoring-No-Wi-Fi.webp?v=1776901783"},{"product_id":"bluelab-ph-penplus","title":"pH PenPlus by Bluelab — Replaceable Probe pH \u0026 Temperature Meter","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab pH PenPlus is a handheld pH and temperature meter with a replaceable probe — when the probe wears out, you screw in a new Bluelab pH ProbePlus instead of binning the whole pen. Built in New Zealand to IP68 waterproof standards with a double-junction probe, backlit display and simple 2-point calibration, it's the long-service upgrade to the classic Bluelab pH Pen that growers have trusted for over a decade.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eReplaceable Probe\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eScrew-cap design lets you swap in a fresh pH ProbePlus when natural probe wear occurs — restore performance without replacing the pen.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eDouble-Junction Accuracy\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eDouble-junction probe resists contamination from nutrient-heavy solutions for reliable ±0.1 pH readings, feed after feed.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eIP68 Waterproof\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eFully dustproof and waterproof — built for wet grow rooms, reservoirs and greenhouse work, not just the odd splash.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eCalibration Made Easy\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eSimple 2-point calibration with a built-in 30-day reminder, plus pH 4.0, pH 7.0 and KCl storage sachets in the box.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Range:\u003c\/strong\u003e 0.0 – 14.0 pH\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.1 pH at 25°C\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.1 pH \/ 1°C\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e 0 – 50°C (°C or °F display, ATC)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProbe:\u003c\/strong\u003e Replaceable double-junction pH\/temp (Bluelab pH ProbePlus)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWaterproof Rating:\u003c\/strong\u003e IP68 dustproof and waterproof\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e Backlit with hold-reading function\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCalibration:\u003c\/strong\u003e 2-point (pH 7.0 + 4.0 or 10.0) with 30-day reminder\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 1 x AAA alkaline battery, approx. 350 hours, auto-off\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2 years pen \/ 6 months probe\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMade In:\u003c\/strong\u003e New Zealand\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIn the Box:\u003c\/strong\u003e Pen, pH 4.0 \u0026amp; 7.0 calibration sachets, KCl storage solution, lanyard\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — Hydrate Before Anything Else\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eThe glass bulb must be hydrated in KCl storage solution for 24 hours before first calibration. A dehydrated probe drifts, reads stuck near pH 7 and can be permanently damaged — this is the single most skipped step with pH pens.\u003c\/li\u003e\n\u003cli\u003eNever soak or store the probe in RO, distilled or deionised water — pure water changes the reference chemistry and kills the probe. KCl only.\u003c\/li\u003e\n\u003cli\u003eKeep a spare pH ProbePlus on the shelf and hydrate it 24 hours before swapping — Bluelab's own tip for zero downtime mid-crop.\u003c\/li\u003e\n\u003cli\u003eCalibrate monthly with fresh pH 7.0 and 4.0 solution — the pen's 30-day reminder tracks it for you.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Use — First Use Setup\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHydrate for 24 hours.\u003c\/strong\u003e Remove the storage cap and place the probe tip in the KCl solution sachet, or stand the pen upright in a small container with enough KCl storage solution to submerge the tip. Leave for at least 24 hours — this conditions the glass bulb so the probe can calibrate correctly. Never use RO, distilled or deionised water.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRinse.\u003c\/strong\u003e After hydration, rinse the probe tip in fresh tap water and gently shake off the excess.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCalibrate — always pH 7.0 first.\u003c\/strong\u003e Place the tip in the pH 7.0 sachet, hold CAL until the display confirms, rinse, then repeat in pH 4.0 (or pH 10.0 if you mostly measure above 7). Both points are required — the pen won't hold a calibration done to 7.0 alone.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMeasure.\u003c\/strong\u003e Dip the probe at least 2cm into your nutrient solution, reservoir or runoff and wait for the reading to stabilise. Short-press the power button to hold a reading.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStore wet.\u003c\/strong\u003e Rinse the probe in fresh tap water after every use and refit the storage cap. Add 3–5 drops of KCl solution to the sponge inside the cap once a week so the probe never dries out.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration \u0026amp; pH Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eFresh calibration solution and pH adjusters keep your readings accurate and your solution in range.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eEC \u0026amp; Nutrient Meters\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003ePair with a conductivity pen to measure nutrient strength alongside pH for the full feeding picture.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/bluelab-1\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eMore From Bluelab\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eProbes, monitors and meters from the New Zealand brand growers have relied on for over 30 years.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFAQ\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need to soak the probe before first use?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Hydrate the probe tip in KCl storage solution for at least 24 hours before calibrating. Skipping this leaves the glass bulb dehydrated — readings drift, sit stuck near pH 7 and the probe can be permanently damaged. Never hydrate in RO, distilled or deionised water.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the probe on the pH PenPlus replaceable?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The screw-cap probe design lets you swap in a new Bluelab pH ProbePlus when the original wears, so you replace the probe rather than the whole pen. Hydrate and calibrate every new probe before use.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the pH PenPlus waterproof?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. It carries an IP68 dustproof and waterproof rating, so it handles wet grow rooms, reservoirs and greenhouse conditions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat is the difference between the pH Pen and the pH PenPlus?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThe PenPlus adds a replaceable double-junction probe, a 2-year pen warranty and IP68 construction. The standard pH Pen has a fixed probe — when it wears out, the whole pen is replaced.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it measure temperature as well as pH?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. It reads solution temperature from 0–50°C with automatic temperature compensation and displays in Celsius or Fahrenheit alongside the pH reading.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes calibration solution come included?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. It ships with pH 4.0 and pH 7.0 calibration sachets plus KCl storage solution, so you can hydrate, calibrate and start measuring without buying anything extra.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eMeasure Once. Trust It.\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eBluelab accuracy with a probe you can replace — shipped fast Australia-wide from Tasmania.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop All Meters\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52063970132266', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52063970132266,"sku":"BL-MTR-PHPEN-PLUS","price":184.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/Bluelab-PENPLUSPH-Product-Image-Front-Render-cmyk_flat.png?v=1785336880"},{"product_id":"bluelab-ph-probeplus","title":"pH ProbePlus by Bluelab — Replacement Probe for pH PenPlus","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab pH ProbePlus is the replacement pH and temperature probe for the Bluelab pH PenPlus. When your probe reaches the end of its service life — or can no longer be calibrated — you swap this in with no tools and keep the pen. It's the whole point of the PenPlus design: replace the consumable part, not the instrument.\u003c\/p\u003e\n\n\u003cdiv style=\"background: #fdecea; border-left: 4px solid #c0392b; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #c0392b; display: block; margin-bottom: 0.5rem;\"\u003eCheck Compatibility Before Ordering\u003c\/strong\u003e\n\u003cspan style=\"font-size: 0.93rem; line-height: 1.6;\"\u003eThe pH ProbePlus fits the Bluelab pH PenPlus only. It is not the BNC-connector Bluelab pH Probe used with Combo Meters, pH Meters and Guardian Monitors. If your device connects via a cable and BNC plug, you need the standard Bluelab pH Probe instead.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eTool-Free Swap\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eUnscrew the collar, pull the old probe, seat the new one and screw it down — done in under a minute, no tools required.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003epH and Temperature\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eRestores both measurements in one swap — full 0.0–14.0 pH range with the same ±0.1 accuracy the pen shipped with.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eDouble-Junction Design\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eResists reference contamination from nutrient-heavy solutions, supporting stable readings across the probe's working life.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eStays Hydrated\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eKCl-filled silicone storage cap with internal sponge keeps the glass bulb wet between uses — the single biggest factor in probe lifespan.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCompatible With:\u003c\/strong\u003e Bluelab pH PenPlus only\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMeasures:\u003c\/strong\u003e pH and temperature\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Range:\u003c\/strong\u003e 0.0 – 14.0 pH\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e ±0.1 pH\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProbe Type:\u003c\/strong\u003e Double-junction, screw-cap fitting\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOperating Environment:\u003c\/strong\u003e Solutions 0.2 EC and above, 0 – 60°C\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Tool-free\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 6-month limited warranty\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBluelab SKU:\u003c\/strong\u003e PROBPLUSPH\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIn the Box:\u003c\/strong\u003e pH ProbePlus with KCl-filled storage cap\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — Hydrate the New Probe First\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eA new probe must be hydrated in KCl storage solution for at least 24 hours, then calibrated, before it goes anywhere near your reservoir. A dehydrated probe drifts, reads stuck near pH 7 and can be permanently damaged.\u003c\/li\u003e\n\u003cli\u003eCalibration and storage solution are sold separately — add pH 7.0 and 4.0 calibration sachets plus KCl storage solution to your order so you can hydrate and calibrate the day it arrives.\u003c\/li\u003e\n\u003cli\u003eNever soak or rinse it in RO, distilled or deionised water — pure water changes the reference chemistry and kills the probe.\u003c\/li\u003e\n\u003cli\u003eBluelab's own pro tip: keep a spare on hand and start hydrating it 24 hours before swapping out the old probe — zero downtime mid-crop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Replace the Probe\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHydrate the new probe.\u003c\/strong\u003e Soak the tip in KCl storage solution for at least 24 hours before installation. Never use RO, distilled or deionised water.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRemove the old probe.\u003c\/strong\u003e Turn the pen off, remove the storage cap, unscrew the collar and pull the existing probe until it detaches.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFit the new probe.\u003c\/strong\u003e Insert the replacement and screw the collar in clockwise until firmly and securely attached.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCalibrate before measuring.\u003c\/strong\u003e Run a full 2-point calibration — pH 7.0 first, then pH 4.0 (or 10.0) — using fresh calibration solution. A new probe is never accurate until it's been hydrated and calibrated.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/products\/bluelab-ph-penplus\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab pH PenPlus\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe pen this probe belongs to — waterproof pH and temperature measurement with a replaceable heart.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration \u0026amp; pH Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eGrab pH 7.0 and 4.0 calibration sachets plus KCl storage solution — you'll need them to hydrate and calibrate the new probe.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/bluelab-1\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eMore From Bluelab\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eProbes, monitors and meters from the New Zealand brand growers have relied on for over 30 years.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFAQ\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes the pH ProbePlus fit the standard Bluelab pH Pen or Combo Meter?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The pH ProbePlus fits the Bluelab pH PenPlus only. The standard pH Pen has a fixed probe, and Combo Meters, pH Meters and Guardian Monitors use the separate BNC-connector Bluelab pH Probe.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes calibration solution come included?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The pH ProbePlus is the replacement probe only — calibration sachets ship with the pH PenPlus pen, not the probe. Add pH 7.0 and 4.0 calibration solution plus KCl storage solution to your order so you can hydrate and calibrate the new probe before use.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need to soak the new probe before using it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Hydrate the probe tip in KCl storage solution for at least 24 hours, then run a full 2-point calibration before taking measurements. Skipping hydration leaves the glass bulb dehydrated — readings drift and the probe can be permanently damaged.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need tools to replace the probe?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The screw-cap design swaps by hand — unscrew the collar, remove the old probe, seat the new one and screw the collar back down.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhen should I replace the probe on my pH PenPlus?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eReplace it when the probe is damaged or can no longer be calibrated. pH probes age through normal use — if cleaning, hydration and recalibration no longer restore stable readings, the glassware has reached the end of its service life.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat warranty does the pH ProbePlus carry?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThe pH ProbePlus carries a 6-month limited warranty. Probes are consumable components that wear with regular use, which is why the warranty is shorter than the 2-year cover on the pen itself.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eReplace the Probe, Not the Pen.\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eRestore full accuracy to your pH PenPlus — shipped fast Australia-wide.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/products\/bluelab-ph-penplus\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop the pH PenPlus\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52066546188586', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52066546188586,"sku":"BL-MTR-PHPROBE-PLUS","price":74.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_Image-Product_BSNPHP00_pH-Probe-Plus_Cap-off.png?v=1785336896"},{"product_id":"bluelab-onepen-replacement-probe","title":"OnePen Replacement Probe by Bluelab — pH, EC \u0026 Temperature Sensor","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab OnePen Replacement Probe restores pH, conductivity (EC) and temperature accuracy to your Bluelab OnePen in one quick swap. When the probe wears out — or can no longer be calibrated — you replace the sensor, not the whole meter. With a double-junction pH probe and titanium EC electrodes, it brings your OnePen back to the precision it shipped with.\u003c\/p\u003e\n\n\u003cdiv style=\"background: #fdecea; border-left: 4px solid #c0392b; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #c0392b; display: block; margin-bottom: 0.5rem;\"\u003eCheck Compatibility Before Ordering\u003c\/strong\u003e\n\u003cspan style=\"font-size: 0.93rem; line-height: 1.6;\"\u003eThis probe fits the Bluelab OnePen (PENONE) only. It does not fit the pH PenPlus, the standard pH Pen, or any BNC-connector Bluelab meter or monitor. The OnePen only accepts genuine Bluelab probes — imitation probes are rejected by the pen.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eThree Measurements, One Swap\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eRestores pH, EC and temperature readings in a single replacement — the full sensor package of the OnePen renewed at once.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eLab-Grade Accuracy\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eRestores the OnePen's full ±0.05 pH and ±0.1 EC accuracy with readings down to two decimal places.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eTitanium EC Electrodes\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eCorrosion-resistant titanium conductivity electrodes and a double-junction pH probe built for nutrient-rich solutions.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eCheaper Than a New Meter\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eExtends the life of your OnePen and keeps a $395 instrument out of landfill — replace the consumable, keep the electronics.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCompatible With:\u003c\/strong\u003e Bluelab OnePen (PENONE) only\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMeasures:\u003c\/strong\u003e pH, conductivity (EC) and temperature\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH:\u003c\/strong\u003e 0.0 – 14.0 pH, ±0.05 at 25°C, double-junction probe\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConductivity:\u003c\/strong\u003e 0 – 10.0 EC, ±0.1 EC, titanium electrodes (factory calibrated)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e 0 – 50°C, ±1°C, with automatic temperature compensation\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOperating Environment:\u003c\/strong\u003e 0 – 50°C, IP68 dustproof and waterproof\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Tool-free — arrow-to-notch alignment, threaded collar\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAverage Probe Life:\u003c\/strong\u003e Approximately 18 months with good care\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 6-month limited warranty\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBluelab SKU:\u003c\/strong\u003e PROBONE\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — Hydrate the Bulb, Not the Electrodes\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eHydrate the pH glass bulb via the storage cap: place a few drops of KCl storage solution on the sponge inside the cap, fit it, and leave for 24 hours before first calibration. A dehydrated bulb drifts, reads stuck near pH 7 and can break.\u003c\/li\u003e\n\u003cli\u003eDo not soak the titanium EC electrodes in KCl solution for any length of time — Bluelab warns against it. The cap-sponge method hydrates the bulb without bathing the electrodes.\u003c\/li\u003e\n\u003cli\u003eNever use RO, distilled or deionised water anywhere near the probe — pure water permanently damages it. KCl only.\u003c\/li\u003e\n\u003cli\u003eClean with Bluelab pH Probe Cleaner and a soft brush on the EC electrodes — never Bluelab Conductivity Probe Cleaner, which Bluelab states is not compatible with the OnePen, and never abrasive cleaners.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Replace the Probe\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRemove the old probe.\u003c\/strong\u003e Remove the storage cap, turn the pen upside down so the batteries stay in place, unscrew the threaded collar and remove the old probe from the pen body.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFit the new probe.\u003c\/strong\u003e Remove the protective cap, line up the arrow on the probe with the notch on the pen body, push it all the way in and secure the threaded collar until fully tightened.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHydrate for 24 hours.\u003c\/strong\u003e Place a few drops of KCl storage solution on the sponge inside the storage cap, refit the cap and leave for 24 hours so the glass bulb is active. Never use RO, distilled or deionised water, and don't soak the titanium electrodes in KCl.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCalibrate pH — always 7.0 first.\u003c\/strong\u003e Rinse the tip in fresh tap water, then run a full 2-point pH calibration with fresh pH 7.0 then 4.0 (or 10.0) solution. EC is factory calibrated — verify against 2.77 EC standard if you want to confirm.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/products\/one-pen-by-bluelab-1\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab OnePen\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe 3-in-1 pH, EC and temperature meter this probe belongs to — one pen for the whole reservoir check.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration \u0026amp; pH Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eGrab pH 7.0 and 4.0 calibration sachets plus KCl storage solution — you'll need them to hydrate and calibrate the new probe.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/bluelab-1\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eMore From Bluelab\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eProbes, monitors and meters from the New Zealand brand growers have relied on for over 30 years.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFAQ\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes this probe fit the pH PenPlus or other Bluelab meters?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. This replacement probe fits the Bluelab OnePen only. The pH PenPlus uses the separate pH ProbePlus, and Combo Meters, pH Meters and Guardian Monitors use BNC-connector probes.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWill a cheaper non-genuine probe work in the OnePen?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The OnePen detects and rejects non-genuine probes with a \"PROBE INVALID\" error — only official Bluelab OnePen Replacement Probes will function.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it replace pH, EC and temperature sensing?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The probe carries all three sensors — a double-junction pH probe, titanium EC electrodes and the temperature sensor — so one swap restores every measurement the OnePen takes.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need to hydrate the new probe before using it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Bluelab recommends hydrating the pH glass bulb for 24 hours before initial calibration — a few drops of KCl storage solution on the sponge inside the storage cap, cap fitted. Don't soak the titanium electrodes in KCl, and never use RO, distilled or deionised water.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow long does an OnePen probe last?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eApproximately 18 months on average, according to Bluelab. pH probes are charged with reference material that expends through use — good hydration and regular cleaning stretch the lifespan, but every probe eventually fails to calibrate and needs replacing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I use Bluelab Conductivity Probe Cleaner on it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. Bluelab states its Conductivity Probe Cleaner is not compatible with the OnePen or this replacement probe. Clean with Bluelab pH Probe Cleaner and a soft brush on the EC electrodes, never abrasives, and recalibrate pH after every clean.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes calibration solution come included?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The probe ships on its own — add pH 7.0 and 4.0 calibration solution and KCl storage solution to your order so you can hydrate and calibrate before first use.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eReplace the Probe, Keep the Pen.\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eRestore pH, EC and temperature accuracy to your OnePen — shipped fast Australia-wide.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/products\/one-pen-by-bluelab-1\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop the OnePen\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52066658189610', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52066658189610,"sku":"BL-MTR-PROBE-ONE","price":159.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_Image_Product_PROBONE_OnePen_Replaceable_Probe_013.png?v=1785336916"},{"product_id":"bluelab-soil-ph-pen","title":"Soil pH Pen by Bluelab — Direct-Reading Soil \u0026 Media pH Meter","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab Soil pH Pen reads pH and temperature directly in soil, coco, potting mix and other growing media — push the probe into the root zone and read the number, no slurry mixing required. The integrated storage cap doubles as a dibber that makes a safe pathway for the glass probe, and the pen is fully waterproof with automatic temperature compensation. It measures nutrient solutions too, making it the one pH tool a soil grower actually needs.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eReads Directly in Soil\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eMeasures pH and temperature straight in the root zone of soil, coco and media — no messy slurries or sample jars needed for a spot check.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eDibber-Protected Probe\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eThe storage cap doubles as a dibber — press it in first to create a pathway, then insert the probe. Protects the fragile glass every measurement.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFully Waterproof\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eWaterproof, not just water resistant — built for wet media, greenhouse work and the knocks of everyday growing.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eSolutions Too\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eAlso measures nutrient solutions and soil slurries with ±0.1 pH accuracy and automatic temperature compensation — one pen for pot and reservoir.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMeasures:\u003c\/strong\u003e pH and temperature, directly in soils\/media and in solution\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Range:\u003c\/strong\u003e 0.0 – 14.0 pH\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.1 pH, ±1°C at 25°C\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.1 pH \/ 1°C\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e 0 – 50°C (°C or °F, automatic temperature compensation)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCalibration:\u003c\/strong\u003e 2-point (pH 7.0 + 4.0 or 10.0) with 30-day reminder; 3-point possible\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWaterproof:\u003c\/strong\u003e Fully waterproof\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e Backlit LCD with hold-reading function\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eStorage Cap:\u003c\/strong\u003e Integrated cap\/dibber, holds KCl storage solution\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 1 x AAA alkaline battery, approx. 350 hours, auto-off\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year limited warranty\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMade In:\u003c\/strong\u003e New Zealand\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — Loosen the Cap, Always\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eAlways twist the storage cap loose before pulling it off or pushing it on — pulling it straight off breaks the glass probe. Check for the gap between cap and dibber first, every time.\u003c\/li\u003e\n\u003cli\u003eIf it dries, it dies. Keep the probe tip covered in KCl storage solution inside the cap at all times, and check the level monthly in long-term storage. A dried-out probe needs a 24-hour KCl re-soak and may already be permanently damaged.\u003c\/li\u003e\n\u003cli\u003eNever store, soak or rinse the probe in RO, distilled or deionised water — pure water changes the reference chemistry and kills the probe.\u003c\/li\u003e\n\u003cli\u003eClean the glassware monthly and before every calibration with Bluelab pH Probe Cleaner or mild detergent and a soft toothbrush — a dirty probe won't calibrate accurately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Use — First Use Setup\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCheck hydration.\u003c\/strong\u003e Stand the pen upright and check the probe tip is covered by KCl storage solution inside the cap. If it isn't, top up the KCl in the cap and stand the pen upright for 24 hours before use — the bulb must be hydrated to calibrate correctly.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCalibrate — always pH 7.0 first.\u003c\/strong\u003e Twist the cap loose and remove it, rinse the tip in fresh tap water, place it in pH 7.0 solution and long-press CAL until the display flashes. When \"CAL 7\" shows, rinse and repeat in pH 4.0 (or 10.0 if you measure above 7). The check mark confirms a completed 2-point calibration.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eDib first, then probe.\u003c\/strong\u003e Clear the top layer of soil, press the cap\/dibber into the sample up to the \"soil\" mark, remove it, then insert the probe gently into the hole it made. Never make the hole with the probe itself, and never apply sideways pressure.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRead and repeat.\u003c\/strong\u003e Wait for the reading to settle, short-press the power button to hold it if needed, and rinse the tip in fresh running water between every measurement. For field testing, average readings from several spots.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStore wet.\u003c\/strong\u003e Rinse the probe, make sure the cap holds enough KCl to cover the tip, then slide the loosened cap on and twist to tighten.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration \u0026amp; pH Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH 7.0 and 4.0 sachets plus KCl storage solution — the pen needs both to stay accurate and hydrated.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/organic-gardening\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eOrganic Gardening\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eLiving-soil inputs, organic fertilisers and amendments — dial in the root zone the pen is reading.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/bluelab-1\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eMore From Bluelab\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eProbes, monitors and meters from the New Zealand brand growers have relied on for over 30 years.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFAQ\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it measure soil pH directly, without a slurry?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The probe reads pH and temperature directly in moist soil, coco and other media — use the cap\/dibber to make the pathway first. It can also measure a prepared soil slurry or nutrient solution when you want a bench-style reading.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan it measure nutrient solutions as well as soil?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. It works in nutrient solutions, reservoirs and soil solutions as well as directly in media, so it covers both the pot and the res.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need to soak the probe before first use?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes — check it first. The tip ships stored in KCl solution inside the cap; if the tip isn't covered, top up the KCl and stand the pen upright for 24 hours before calibrating. A dehydrated probe drifts, reads stuck near pH 7 and can be permanently damaged. Never use RO, distilled or deionised water.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I use it in dry soil?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo — the sample needs moisture for a reliable reading. For dry samples, Bluelab recommends moistening with RO or distilled water and ideally waiting 24 hours before measuring (tap water shifts the reading with its own pH). Note that's for the soil sample only — never put RO or distilled water on the probe itself.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat pH should my soil be?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eBluelab's recommended range for soil-grown crops is 6.2 – 7.2 pH (plant specific), versus 5.5 – 6.3 for solution growing. Outside the right range, nutrients lock up and plants can't access them no matter how well you feed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the probe replaceable?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The Soil pH Pen has a fixed probe — when the glassware ages beyond calibration, the unit is replaced. Good care stretches its life considerably: keep the tip wet in KCl, clean monthly, use the dibber every time and never force the cap.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow often should I calibrate it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThe pen tracks it for you — the calibration check mark disappears 30 days after your last successful calibration. Also recalibrate after every clean, after a battery change, or whenever a reading looks off. Always pH 7.0 first, then 4.0 or 10.0.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eKnow Your Root Zone.\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eSoil pH straight from the pot, no slurry required — shipped fast Australia-wide.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop All Meters\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52066827501866', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52066827501866,"sku":"BL-MTR-PHPEN-SOIL","price":299.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_Image-Product_Front-PNG_PENSOILPH.png?v=1785336926"},{"product_id":"bluelab-conductivity-pen","title":"Conductivity Pen by Bluelab — Fast, Accurate EC, PPM \u0026 Temperature Testing","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab Conductivity Pen tells you exactly how strong your nutrient solution is, in seconds. Dip it in your reservoir and it reads EC, ppm 500 (TDS) or ppm 700 plus solution temperature on a backlit display — so you know whether to feed harder or back off before your plants tell you the hard way. It's factory calibrated, fully waterproof, and built by Bluelab in New Zealand for grow rooms, not laboratories.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eReady Out of the Box\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eFactory calibrated with the AAA battery included. Turn it on and start reading — calibration is optional, not required.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eReads the Scales You Use\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eSwitch between EC, ppm 500 (TDS) and ppm 700 to match whatever scale your nutrient chart is written in.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eTemperature Compensated\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eAutomatic Temperature Compensation (ATC) corrects the reading for solution temperature, so it's accurate in a cold shed or a warm tent.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFully Waterproof\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eNot just splash resistant — drop it in the reservoir and it survives. Hold function freezes the reading so you don't lose it.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMeasurement range\u003c\/strong\u003e\u003cbr\u003e0.0–10.0 EC \/ 0–5000 ppm (500) \/ 0–7000 ppm (700)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTemperature range\u003c\/strong\u003e\u003cbr\u003e0–50°C \/ 32–122°F\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAccuracy at 25°C\u003c\/strong\u003e\u003cbr\u003e±0.1 EC \/ ±50 ppm (500) \/ ±70 ppm (700), ±1°C\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eResolution\u003c\/strong\u003e\u003cbr\u003e0.1 EC \/ 10 ppm, 1°C\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTemperature compensation\u003c\/strong\u003e\u003cbr\u003eAutomatic (ATC)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCalibration\u003c\/strong\u003e\u003cbr\u003eFactory calibrated — manual calibration optional\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eUnits\u003c\/strong\u003e\u003cbr\u003eEC, ppm 500, ppm 700, °C, °F\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003cbr\u003eBacklit LCD with low battery indicator\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePower\u003c\/strong\u003e\u003cbr\u003e1 x AAA alkaline (included) — approx. 350 hours\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOther\u003c\/strong\u003e\u003cbr\u003eFully waterproof, auto off, hold reading function\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003e1-year limited warranty\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMade by\u003c\/strong\u003e\u003cbr\u003eBluelab, New Zealand\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — Keep the Probe Clean\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eThe pen is only as accurate as the probe is clean. Rinse it under running tap water after every use to stop nutrient salts building up.\u003c\/li\u003e\n\u003cli\u003eEvery two weeks, clean the probe face with a drop of Bluelab Conductivity Probe Cleaner or an unscented cream cleanser like Jif — never scented varieties, the oils contaminate the probe.\u003c\/li\u003e\n\u003cli\u003eLow readings almost always mean a dirty probe, not a faulty pen. Clean it and retest before assuming anything's wrong.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Use It\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003ePress the power button to turn the pen on. It recalls your last measurement for 3 seconds, then it's ready to read.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003ePlace the probe in your nutrient solution and wait for the reading to stabilise.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003eShort press the power button to hold the reading on screen if you need to note it down. To change units, hold the units button for 3 seconds and cycle through EC, ppm 500 and ppm 700.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003eRinse the probe under running water after each use, and give it a proper clean every two weeks. If you choose to calibrate, always clean the probe first, then use Bluelab 2.77 EC standard solution.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab pH PenPlus\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eEC tells you how much food is in the water — pH tells you whether the plant can eat it. Run both for the full picture.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration \u0026amp; Probe Care\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003e2.77 EC standard solution and probe cleaner keep your readings honest for years.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/water-control\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eWater Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003ePumps, reservoirs and dosing gear to act on what the pen tells you.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/hydroponic-nutrients\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eNutrients\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eBase nutrients and additives — measured feeds beat guesswork every time.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes the Bluelab Conductivity Pen need calibrating before first use?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. It's factory calibrated and ready to use out of the box. Manual calibration is optional — if you want to check it, clean the probe first, then calibrate in Bluelab 2.77 EC standard solution.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it measure pH?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. This pen measures conductivity (EC\/ppm) and temperature only. For pH, pair it with the Bluelab pH PenPlus — the two together cover everything you need to know about your nutrient solution.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the pen waterproof?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes, fully waterproof — provided the battery cap is fastened down with no gap between cap and body. It will survive a dunk in the reservoir.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it read the 540 ppm scale?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. It reads EC, ppm 500 (TDS) and ppm 700. If your feed chart uses the 540 scale, set the pen to EC and multiply the reading by 540 to convert.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhy is my pen reading low?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eLow readings usually mean the probe is contaminated with nutrient salt build-up, not that the pen is faulty. Clean the probe face with Bluelab Conductivity Probe Cleaner or an unscented cream cleanser, rinse, and retest in a known solution.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat battery does it take?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eOne AAA alkaline battery, included, with around 350 hours of life. Don't use rechargeables — Bluelab specifies alkaline only.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eStop Guessing Your Nutrient Strength\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eBluelab accuracy, backed by a 1-year warranty. Free shipping over $499*.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop All Meters\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52066895528234', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52066895528234,"sku":"BL-MTR-ECPEN","price":159.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_Image-Product_Front-PNG_PENCON_44ae00d4-f9c4-4ae5-af5d-979572d7769f.png?v=1785336938"},{"product_id":"bluelab-ph-conductivity-starter-pack","title":"pH \u0026 Conductivity Starter Pack by Bluelab — Complete pH, EC \u0026 Temperature Testing Kit","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab pH and Conductivity Starter Pack puts the two measurements every grower needs in one box: pH tells you whether your plants can actually absorb their food, EC tells you how much food is in the water. You get the Bluelab pH Pen, the Bluelab Conductivity Pen, and the full Probe Care Kit with everything needed to hydrate, calibrate, clean and store both pens — plus access to the Bluelab Grow Book. One purchase, complete reservoir control from day one.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eBoth Fundamentals Covered\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003epH, EC\/ppm and temperature from two purpose-built pens — the complete picture of your nutrient solution.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eCare Kit Included\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003epH 7.0 and 4.0 calibration sachets, KCl storage solution, 2.77 EC standard, probe cleaners, cups and brush — no extra purchases to get started properly.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFully Waterproof, They Float\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eBoth pens are built for nutrient reservoirs — drop one in and fish it out, no damage done.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eBetter Value Than Pens Alone\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eThe pH Pen can't take its first reading without KCl and calibration solutions — buy the pens bare and you're buying those anyway. Here the full care kit is in the box for a few dollars more.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBluelab pH Pen\u003c\/strong\u003e\u003cbr\u003epH and temperature meter, double-junction probe\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBluelab Conductivity Pen\u003c\/strong\u003e\u003cbr\u003eEC, ppm 500 (TDS), ppm 700 and temperature meter\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBluelab Probe Care Kit (pH \u0026amp; Conductivity)\u003c\/strong\u003e\u003cbr\u003epH 7.0, pH 4.0 and KCl storage solution sachets, 2.77 EC standard solution, probe cleaners, cleaning instruments and cups\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBluelab Grow Book\u003c\/strong\u003e\u003cbr\u003eAccess to Bluelab's growing guide, built from 30+ years of experience\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Pen range\u003c\/strong\u003e\u003cbr\u003e0.0–14.0 pH, ±0.1 pH accuracy at 25°C\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Pen probe\u003c\/strong\u003e\u003cbr\u003eDouble-junction, not replaceable\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Pen calibration\u003c\/strong\u003e\u003cbr\u003eManual 2-point (pH 7.0 first, then 4.0 or 10.0), 30-day calibration reminder on screen\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConductivity Pen range\u003c\/strong\u003e\u003cbr\u003e0.0–10.0 EC \/ 0–5000 ppm (500) \/ 0–7000 ppm (700), ±0.1 EC accuracy\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConductivity Pen calibration\u003c\/strong\u003e\u003cbr\u003eFactory calibrated — manual calibration optional\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTemperature\u003c\/strong\u003e\u003cbr\u003e0–50°C on both pens, Automatic Temperature Compensation\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBuild\u003c\/strong\u003e\u003cbr\u003eFully waterproof, backlit LCD, hold function, auto off — both pens\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePower\u003c\/strong\u003e\u003cbr\u003e1 x AAA alkaline per pen (approx. 350 hours each)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003e1-year limited warranty on both pens\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMade by\u003c\/strong\u003e\u003cbr\u003eBluelab, New Zealand\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — The pH Pen Probe Must Never Dry Out\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eBluelab's manual puts it bluntly: if it dries, it dies. Before first use, stand the pH Pen upright in a small container with enough KCl storage solution (included in your care kit) to submerge the probe tip, and soak for at least 24 hours. Never use RO, distilled or deionised water — pure water kills the probe.\u003c\/li\u003e\n\u003cli\u003eEvery week, add 3–5 drops of KCl solution into the wetting seal inside the storage cap, and always rinse the probe in fresh water before recapping after use.\u003c\/li\u003e\n\u003cli\u003eThe Conductivity Pen needs none of this — no glass bulb, no hydration. Just rinse it after each use and clean the probe face fortnightly with the included cleaner or an unscented cream cleanser like Jif.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eGetting Started\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003eHydrate the pH Pen: remove the storage cap, stand the pen upright in a small container, add enough KCl storage solution to submerge the probe tip, and leave it for at least 24 hours. Rinse the tip in fresh water afterwards.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003eCalibrate the pH Pen to 2 points using the included sachets — always pH 7.0 first, then pH 4.0 (or 10.0 if your readings normally sit above 7). It won't hold calibration on 7.0 alone. Recalibrate after every clean, after battery changes, and when the on-screen check mark disappears at 30 days.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003eThe Conductivity Pen is factory calibrated — turn it on and start reading. If you ever want to verify it, clean the probe first, then check against the included 2.77 EC standard solution.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003eDip both pens in your reservoir, wait for the readings to stabilise, and adjust your solution. Rinse both probes in fresh water after every use — recap the pH Pen, and give the EC probe face a proper clean every two weeks.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration \u0026amp; Storage Solutions\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eRestock pH 7.0\/4.0 sachets, KCl storage solution and 2.77 EC standard when the care kit runs out.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/water-control\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003epH Up \u0026amp; Down\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eOnce you can measure pH, you need to adjust it — dosing solutions in the Water Control range.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/hydroponic-nutrients\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eNutrients\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eBase nutrients and additives — dial in exact EC targets instead of feeding blind.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/starter-kits-all\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eStarter Kits\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eSetting up a full grow? Browse complete starter kits for tents, lighting and nutrients.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the starter pack ready to use out of the box?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003ePartly. The Conductivity Pen is factory calibrated and ready immediately. The pH Pen needs a minimum 24-hour hydration soak in the included KCl storage solution, then a 2-point calibration with the included pH 7.0 and 4.0 sachets before its first reading.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat's included in the Probe Care Kit?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThe pH and Conductivity care kit contains pH 7.0, pH 4.0 and KCl storage solution sachets, 2.77 EC standard solution, probe cleaners, cleaning instruments and plastic cups — everything to hydrate, calibrate, clean and store both pens.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the pH Pen's probe replaceable?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The pH Pen uses a fixed double-junction probe. If you want a pen with a replaceable probe, look at the Bluelab pH PenPlus — when its probe eventually wears out you screw in a new one instead of replacing the pen.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eAre the pens waterproof?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes, both pens are fully waterproof and float, provided the battery cap is fastened down with no gap between cap and body.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the pack better value than buying the pens separately?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The pack costs only a few dollars more than the two pens alone and includes the full Probe Care Kit — the KCl storage solution and pH calibration sachets the pH Pen must have before its first reading, plus the 2.77 EC standard, probe cleaners and cups. Buy the pens bare and you're purchasing those solutions separately anyway.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow often does the pH Pen need calibrating?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eCalibrate before first use, after every clean, after changing the battery, and whenever the check mark disappears from the screen — it fades 30 days after the last calibration as a built-in reminder. Always 2 points: pH 7.0 first, then 4.0 or 10.0.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eMeasure the Fundamentals From Day One\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eTwo Bluelab pens, full care kit, 1-year warranty on both. Free shipping over $499*.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop All Meters\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52066922823978', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52066922823978,"sku":"BL-MTR-PENSTP","price":314.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_Image_Product_PENSTP_Bluelab_pH_and_Conductivity_Starter_Pack.png?v=1785336941"},{"product_id":"bluelab-ph-probe-2m","title":"pH Probe by Bluelab — 2m BNC Replacement Probe for Bluelab Meters, Monitors \u0026 Controllers","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab pH Probe is the standard 2-metre BNC replacement probe for Bluelab meters, monitors and controllers. When your Guardian or pH Controller starts drifting and cleaning won't bring it back, this is the part you swap — a double-junction, gel-filled probe in a polycarbonate body, with the probe holder suction cup and a KCl-filled storage cap in the box. Connect it, calibrate it, and your readings are trustworthy again without replacing the whole unit.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFits Any Bluelab BNC Device\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eStandard BNC connector — push on, quarter turn, done. Compatible with Bluelab handheld meters, monitors and controllers that take a BNC probe.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eDouble-Junction Longevity\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eThe double-junction Ag\/AgCl reference resists contamination, so the probe stays accurate longer in dirty nutrient solutions.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003e2m Cable Reaches the Reservoir\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eTwo metres of cable with a waterproof joint puts the probe in the tank while the meter stays dry and readable.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eMounting Sorted\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eProbe holder with suction cup included — fix it to the reservoir wall at the right depth and leave it there.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMeasurement range\u003c\/strong\u003e\u003cbr\u003e0.0–14.0 pH\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAccuracy at 25°C\u003c\/strong\u003e\u003cbr\u003e±0.1 pH\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eReference\u003c\/strong\u003e\u003cbr\u003eDouble junction, Ag\/AgCl, saturated KCl gel (non-refillable)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnector\u003c\/strong\u003e\u003cbr\u003eStandard BNC, waterproof cable joint\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCable length\u003c\/strong\u003e\u003cbr\u003e2 metres \/ 6.5 feet\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBody\u003c\/strong\u003e\u003cbr\u003ePolycarbonate, waterproof probe\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOperating environment\u003c\/strong\u003e\u003cbr\u003e0–60°C \/ 32–144°F\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIncluded\u003c\/strong\u003e\u003cbr\u003eProbe holder with suction cup, KCl-filled storage cap\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003e6-month limited warranty\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMade by\u003c\/strong\u003e\u003cbr\u003eBluelab, New Zealand\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — If It Dries, It Dies\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eThe probe tip must stay wet at all times. When it's not in the reservoir, keep the storage cap on with enough Bluelab KCl storage solution to cover the tip. Never use RO, distilled or deionised water — pure water changes the reference chemistry and kills the probe.\u003c\/li\u003e\n\u003cli\u003eIf the tip has dried out or hasn't been stored in KCl, clean it, then stand it in a container of KCl solution submerging the tip for at least 24 hours, and calibrate afterwards.\u003c\/li\u003e\n\u003cli\u003eHandle it like the glass instrument it is: always loosen the storage cap before pulling it off, don't bend or knock the probe, don't kink the lead, and never let the BNC connector get wet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Install and Calibrate\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003eConnect the probe to your meter, monitor or controller: line up the lugs of the BNC fitting, push on, and twist a quarter turn to lock.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003eRemove the storage cap: grip the top, twist the base one rotation to loosen, then slide the cap off slowly. Keep the cap and its KCl solution — you'll need it every time the probe comes out of the reservoir.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003eCalibrate before first use — no cleaning needed the very first time. Always 2 points: pH 7.0 first, then 4.0 (or 10.0 if your readings normally sit above 7). Rinse the tip in clean water between solutions, and calibrate at the same temperature as the solution you'll be measuring.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003eRecalibrate monthly, and clean the probe first every time after that initial calibration. Also recalibrate whenever readings look off, after battery changes, or after the probe has been disconnected.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/collections\/bluelab\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab Wi-Fi Guardian \u0026amp; pH Controller\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe devices this probe keeps honest — browse the full Bluelab range.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration \u0026amp; KCl Solutions\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH 7.0 and 4.0 standards for monthly calibration, KCl storage solution to keep the tip alive.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eMeters \u0026amp; Pens\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eHandheld pH and EC testing for spot checks alongside your monitored reservoir.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/water-control\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eWater Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH Up and Down, dosing gear and reservoir hardware to act on the readings.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes this probe fit the Bluelab Guardian and pH Controller?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. It's compatible with Bluelab handheld meters, monitors and controllers that use a standard BNC probe connection, including the Guardian Monitor, pH Controller and Combo Meter.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it fit the Bluelab pH Pen or pH PenPlus?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The pens don't take a BNC probe — the pH Pen's probe is fixed, and the pH PenPlus uses its own screw-in pH ProbePlus, which we stock separately.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes the probe need calibrating before use?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Calibrate before first use (no cleaning required for that initial calibration) and then monthly — always 2-point, pH 7.0 first, then 4.0 or 10.0. Clean the probe before every calibration after the first.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhat warranty does it carry?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThe Bluelab pH Probe carries a 6-month limited warranty with proof of purchase. pH probes are consumable glass instruments — they age with normal use, and lifespan depends heavily on storage and care.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhy is my probe drifting or stuck on one reading?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eDrift usually means a contaminated or dried-out tip — clean it, hydrate it in KCl storage solution for 24 hours, and recalibrate. A probe that reads the same in every buffer has broken glassware and needs replacing. If it reads pH 7 for everything, check the BNC fitting and cable for damage or moisture first.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan the BNC connector get wet?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The probe and cable joint are waterproof, but the BNC connector at the meter end must stay dry — a wet fitting causes false readings and isn't covered under warranty.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eBring Your Bluelab Back to Accurate\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eGenuine Bluelab replacement probe, holder and KCl cap included. Free shipping over $499*.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/bluelab\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop All Bluelab\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52067085812010', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52067085812010,"sku":"BL-MTR-PROBE-PH-2M","price":129.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_Image-Product_pH-Probe-new-logo-no-background_1.png?v=1785336955"},{"product_id":"bluelab-kcl-storage-solution","title":"pH Probe KCl Storage Solution by Bluelab — Keep pH Probes Hydrated \u0026 Accurate","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eBluelab pH Probe KCl Storage Solution is what keeps a pH probe alive. Every Bluelab pH pen and probe stores wet — the glass tip sits in KCl solution between uses, and a probe left dry drifts, slows down and eventually dies for good. This is Bluelab's own laboratory-grade solution, made specifically for their pH pens and probes, to keep response fast and readings accurate for the life of the instrument. Available as a single-use sachet or in 120ml and 250ml bottles.\u003c\/p\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eExtends Probe Life\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003epH probes are consumable glass instruments — stored dry, their life and performance drop hard. KCl storage is the single biggest thing you can do to make one last.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFaster, Truer Readings\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eA properly hydrated probe responds quickly and settles on a stable number instead of drifting around it.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eMade for Bluelab pH Gear\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eFormulated for the Bluelab pH Pen, Soil pH Pen, pH Probes and Soil pH Probes, to Bluelab's laboratory standards.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eA Size for Every Grower\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eSingle-use sachet for a hydration soak or care-kit top-up, 120ml for pen owners, 250ml for probes living in storage caps year-round.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 1.1rem; font-weight: bold; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSolution type\u003c\/strong\u003e\u003cbr\u003eKCl (potassium chloride) pH probe storage solution\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSizes\u003c\/strong\u003e\u003cbr\u003eSingle-use sachet, 120ml bottle, 250ml bottle\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFor use with\u003c\/strong\u003e\u003cbr\u003eBluelab pH Pen, Soil pH Pen, pH Probes, Soil pH Probes\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePurpose\u003c\/strong\u003e\u003cbr\u003eStorage and hydration — increases response speed, maximises probe life\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eQuality\u003c\/strong\u003e\u003cbr\u003eManufactured to high laboratory standards\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eInstructions\u003c\/strong\u003e\u003cbr\u003ePrinted on the bottle label — follow Bluelab's product-specific manual for your pen or probe\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — Never Substitute Plain Water\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eNever store or soak a pH probe in RO, distilled or deionised water. Pure water changes the chemistry in the probe's reference and kills it — this is the number one way growers destroy pH probes, and it's exactly what KCl solution exists to prevent.\u003c\/li\u003e\n\u003cli\u003eKeep a bottle next to your meter. The moment a probe comes out of the reservoir, rinse it in fresh tap water and put it back in a KCl-filled storage cap.\u003c\/li\u003e\n\u003cli\u003eIf a probe has been left dry, don't bin it yet — clean it, soak the tip in KCl solution for at least 24 hours, then recalibrate. If calibration holds, it survived.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 1.1rem; font-weight: bold; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow to Use It\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003eEveryday storage: keep enough KCl solution in the probe's storage cap to cover the tip. For pens, add 3–5 drops into the wetting seal inside the cap each week.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003eMonthly hydration: stand the pen or probe upright in a small container with enough KCl solution to submerge the tip, per the instructions on the label.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003eFirst use or dried-out probe: soak the tip in KCl solution for at least 24 hours, rinse in fresh water, then calibrate before trusting a reading.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: bold; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003eAlways follow the manual for your specific Bluelab pen or probe — storage details differ slightly between models, and the product manual is the final word.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 1.1rem; font-weight: bold; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab pH Pens \u0026amp; Probes\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe instruments this solution keeps alive — pH PenPlus, pH Pen and the 2m BNC pH Probe.\u003c\/p\u003e\n\u003c\/a\u003e\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003epH Calibration Solutions\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH 7.0 and 4.0 standards — hydration and calibration go together on every pH probe.\u003c\/p\u003e\n\u003c\/a\u003e\u003ca href=\"\/collections\/bluelab\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eAll Bluelab\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eMeters, monitors, controllers and care gear from the full Bluelab range.\u003c\/p\u003e\n\u003c\/a\u003e\u003ca href=\"\/collections\/water-control\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eWater Control\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH Up and Down, buffers and dosing gear for the whole reservoir routine.\u003c\/p\u003e\n\u003c\/a\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 1.1rem; font-weight: bold; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I store my pH probe in tap, RO or distilled water instead?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. RO, distilled and deionised water change the chemistry in the probe's reference and permanently damage it — Bluelab is explicit on this. Tap water rinses are fine, but storage must be in KCl solution.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhich Bluelab products does it work with?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eBluelab specifies it for the pH Pen, Soil pH Pen, pH Probes and Soil pH Probes — any Bluelab pH instrument with a glass probe tip that stores wet.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow often should I hydrate my probe?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eBluelab recommends storing in KCl after every use and hydrating monthly, with a full 24-hour soak before first use or whenever a probe has been allowed to dry out. Pens also take 3–5 drops into the storage cap's wetting seal weekly.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eShould I buy the sachet or a bottle?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThe sachet covers a one-off hydration soak or a care-kit top-up. If you own a pH pen or probe, a bottle is the practical choice — storage is an every-use habit, and the 250ml works out far cheaper per ml for probes living in KCl year-round.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eMy probe dried out — is it dead?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNot necessarily. Clean the tip, soak it in KCl solution for at least 24 hours, then run a full 2-point calibration. If calibration succeeds and holds, the probe survived; if it won't calibrate or reads the same in every buffer, it's permanently damaged and needs replacing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eThe Cheapest Insurance a pH Probe Can Get\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eGenuine Bluelab KCl solution — because a dry probe is a dead probe. Free shipping over $499*.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e \u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop Probe Care\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 1.5rem 0 0;\"\u003e\n\u003cp style=\"font-size: 0.95rem; font-weight: bold; margin-bottom: 0.75rem; color: #1a1a1a;\"\u003eSelect Size\u003c\/p\u003e\n\u003cdiv style=\"display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.5rem;\"\u003e\n\u003cbutton data-variant-id=\"52067136864554\" class=\"tgg-size-btn-kcl\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #2e5e2e; color: #fff; font-size: 0.95rem; font-weight: bold; cursor: pointer;\"\u003eSachet\u003c\/button\u003e \u003cbutton data-variant-id=\"52067136897322\" class=\"tgg-size-btn-kcl\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #fff; color: #2e5e2e; font-size: 0.95rem; font-weight: 600; cursor: pointer;\"\u003e120ml Bottle\u003c\/button\u003e \u003cbutton data-variant-id=\"52067136930090\" class=\"tgg-size-btn-kcl\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #fff; color: #2e5e2e; font-size: 0.95rem; font-weight: 600; cursor: pointer;\"\u003e250ml Bottle\u003c\/button\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n\n  var selectedVariantId = '52067136864554';\n\n  var sizeBtns = document.querySelectorAll('.tgg-size-btn-kcl');\n  sizeBtns.forEach(function(b) {\n    b.addEventListener('click', function() {\n      selectedVariantId = this.getAttribute('data-variant-id');\n      sizeBtns.forEach(function(ob) {\n        ob.style.background = '#fff';\n        ob.style.color = '#2e5e2e';\n        ob.style.fontWeight = '600';\n      });\n      this.style.background = '#2e5e2e';\n      this.style.color = '#fff';\n      this.style.fontWeight = '700';\n    });\n  });\n\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt(selectedVariantId, 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Sachet","offer_id":52067136864554,"sku":"BL-SOL-KCL-SACHET","price":2.95,"currency_code":"AUD","in_stock":false},{"title":"120ml Bottle","offer_id":52067136897322,"sku":"BL-SOL-KCL-120ML","price":26.95,"currency_code":"AUD","in_stock":true},{"title":"250ml Bottle","offer_id":52067136930090,"sku":"BL-SOL-KCL-250ML","price":44.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_Image-Product_176080B-Sachet-KCL-copy.png?v=1785336969"},{"product_id":"bluelab-probe-care-kit-ph","title":"Probe Care Kit – pH by Bluelab — Clean, Calibrate \u0026 Hydrate pH Probes","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab Probe Care Kit – pH is the complete maintenance routine for any Bluelab pH pen or probe in one box: cleaner and brush to strip the built-up residue that makes readings drift, pH 7.0 and 4.0 sachets for the 2-point calibration that brings accuracy back, and KCl storage solution to keep the glass tip alive between uses. The instrument is only as accurate as the probe is clean — this kit is how you keep it that way.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eClean, Calibrate, Store — One Kit\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eEvery consumable and tool the monthly pH probe routine needs, with Bluelab's care instructions included.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFixes Drifting Readings\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eResidue build-up slows probes down and pulls readings off true. Cleaning plus a fresh 2-point calibration restores accuracy.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eWorks Across All Bluelab pH Gear\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eThe same clean-and-calibrate process applies to every Bluelab pH pen and probe — one kit covers whatever you run.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eCheaper Than a New Probe\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003epH probes are consumable glass — regular care is what stretches their life. A kit costs a fraction of the replacement it delays.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eWhat's in the Kit\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCalibration sachets\u003c\/strong\u003e\u003cbr\u003e2 x single-use pH 7.0, 2 x single-use pH 4.0\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eStorage solution\u003c\/strong\u003e\u003cbr\u003e2 x single-use KCl storage solution sachets\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBluelab pH Probe Cleaner\u003c\/strong\u003e\u003cbr\u003eFor stripping residue off the glass tip\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCleaning instrument\u003c\/strong\u003e\u003cbr\u003eSoft toothbrush for heavy contamination around the glassware\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e3 x plastic cups\u003c\/strong\u003e\u003cbr\u003eFor cleaning, calibration and hydration soaks\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProbe care instructions\u003c\/strong\u003e\u003cbr\u003eBluelab's step-by-step routine\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tip — Get the Details Right\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eSachets are single-use. Tip them into a clean cup, calibrate, and discard — never pour used solution back or dip the probe straight into the sachet you'll reuse. Contaminated calibration solution means a false calibration.\u003c\/li\u003e\n\u003cli\u003eRinse the probe tip in clean water between the 7.0 and 4.0 solutions so you don't drag one buffer into the other.\u003c\/li\u003e\n\u003cli\u003eNever rinse, soak or store a pH probe in RO, distilled or deionised water — pure water changes the reference chemistry and kills the probe. Tap water for rinsing, KCl for storage, always.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eThe Monthly Routine\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003eClean: rinse the probe tip under fresh tap water, then stir it gently in a cup of clean water with a small amount of pH Probe Cleaner. For heavy build-up, brush gently around the glassware with the toothbrush and a few drops of cleaner. Rinse all traces off under running water.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003eCalibrate — always 2 points, always pH 7.0 first: tip a fresh 7.0 sachet into a clean cup, calibrate, rinse the tip, then calibrate in fresh pH 4.0. Calibration is required after every clean; a single-point calibration won't hold.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003eStore: keep the probe tip covered with KCl storage solution in its storage cap. If a probe has been allowed to dry out, soak the tip in KCl for at least 24 hours, then clean and recalibrate.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003eRepeat monthly, and any time readings look wrong, after battery changes, or when your meter's calibration reminder appears. Follow your specific pen or probe's manual where details differ — it's the final word.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/products\/bluelab-kcl-storage-solution\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab KCl Storage Solution\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eBottles for everyday storage once the kit's sachets are gone — the habit that keeps probes alive.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCalibration Solutions\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eRestock pH 7.0 and 4.0 sachets and buffers for the monthly recalibration.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eBluelab pH Pens \u0026amp; Probes\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe gear this kit maintains — pH PenPlus, pH Pen and the 2m BNC pH Probe.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/bluelab\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eAll Bluelab\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eMeters, monitors, controllers and care gear from the full range.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes this kit work with the pH PenPlus, pH Pen and pH Probe?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The clean, calibrate and store process is the same across all Bluelab pH pens and probes — this kit covers any of them. Always follow your specific product's manual where the storage details differ.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it include EC\/conductivity solutions?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. This is the pH-only kit — no 2.77 EC standard and no conductivity probe cleaner. If you run an EC pen as well, Bluelab makes a combined pH and Conductivity care kit that covers both.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow often should I use it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eMonthly is the standard cadence — clean, then recalibrate. Also run the routine whenever readings drift or look wrong, after changing batteries, and whenever your meter's calibration reminder appears.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eAre the sachets reusable?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. All sachets are single-use — pour into a clean cup, use, and discard. Reusing calibration solution contaminates it, and a probe calibrated in contaminated solution reads wrong from that point on.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWill cleaning fix a probe that reads the same in every solution?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. A probe showing the same reading in every buffer has broken glassware and needs replacing — no amount of cleaning recovers it. Cleaning and recalibration fix drift and slow response, not physical damage.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eYour pH Probe Is Only as Good as Its Care\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eThe full Bluelab maintenance routine in one kit. Free shipping over $499*.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop Probe Care\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52067148136746', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52067148136746,"sku":"BL-KIT-CARE-PH","price":34.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_CAREKITPH_Box_Contents_Image.png?v=1785336985"},{"product_id":"bluelab-probe-care-kit-ph-conductivity","title":"Probe Care Kit – pH \u0026 Conductivity by Bluelab — Clean, Calibrate \u0026 Restore Accurate Probe Readings","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Bluelab Probe Care Kit – pH \u0026amp; Conductivity is the complete service kit for your pH and EC meters in one box. Nutrient salts, oils and organic matter build up on probe faces over time, and a dirty probe reads wrong — which means your whole feed chart is working off bad numbers. This kit gives you both probe cleaners, calibration and storage solutions, and the cleaning tools to bring your readings back to accurate and keep them there. One monthly service takes about as long as brushing your teeth.\u003c\/p\u003e\n\n\u003cdiv style=\"background: #fdecea; border-left: 4px solid #c0392b; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #c0392b; display: block; margin-bottom: 0.5rem;\"\u003eOnePen Owners — Read This First\u003c\/strong\u003e\n\u003cspan style=\"font-size: 0.93rem; line-height: 1.6;\"\u003eThe Conductivity Probe Cleaner in this kit is not compatible with the Bluelab OnePen (PENONE) or its Replacement Probe (PROBONE). Everything else in the kit — pH cleaner, calibration sachets, KCl storage solution — is fine to use with the OnePen. Never soak a OnePen's titanium EC electrodes in cleaning solution.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFull Service In One Box\u003c\/strong\u003e\n\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eCleaners, calibration sachets, KCl storage solution, brush, chamois and cups — nothing else to buy for a complete probe service.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eRestores Reading Accuracy\u003c\/strong\u003e\n\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eRemoves the salt and residue build-up that causes pH drift and low EC readings, so your meter tells you the truth.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eProper 2-Point Calibration\u003c\/strong\u003e\n\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eTwo sachets each of pH 7.0 and pH 4.0 — enough for two full calibrations done the way Bluelab specifies.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eExtends Probe Life\u003c\/strong\u003e\n\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eRegular cleaning and correct KCl storage is the difference between a probe that lasts and one you replace every season.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eWhat's In The Kit\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; margin-bottom: 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Probe Cleaner:\u003c\/strong\u003e 1 x 30ml bottle\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConductivity Probe Cleaner:\u003c\/strong\u003e 1 x 30ml bottle\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH 7.0 Calibration Solution:\u003c\/strong\u003e 2 x 18ml sachets\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH 4.0 Calibration Solution:\u003c\/strong\u003e 2 x 18ml sachets\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e2.77 EC Standard Solution:\u003c\/strong\u003e 2 x 18ml sachets\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eKCl Storage Solution:\u003c\/strong\u003e 2 x 18ml sachets\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCleaning Tools:\u003c\/strong\u003e Toothbrush (pH) \u0026amp; chamois (EC)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAlso Included:\u003c\/strong\u003e 3 plastic cups \u0026amp; care instructions\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Bluelab (New Zealand)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSuits:\u003c\/strong\u003e Bluelab pens, meters, monitors \u0026amp; controllers\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"color: #e65100; display: block; margin-bottom: 0.5rem;\"\u003eGrow Guys Tips\u003c\/strong\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eService monthly. If your EC reading looks low, that is the classic sign the conductivity probe needs a clean.\u003c\/li\u003e\n\u003cli\u003epH calibration is always 2-point: pH 7.0 first, then pH 4.0. A single-point calibration will not hold.\u003c\/li\u003e\n\u003cli\u003eEC probes are never calibrated — the 2.77 EC solution is for verifying your probe reads true after cleaning.\u003c\/li\u003e\n\u003cli\u003eStore pH probes wet in KCl storage solution. Never in RO, distilled or deionised water — it will damage the probe.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eHow To Service Your Probes\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\n\u003cspan\u003eRinse both probes in fresh tap water. Never rub or wipe a pH probe face — it holds a static charge that rubbing destroys.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\n\u003cspan\u003eClean the pH probe with pH Probe Cleaner using the supplied toothbrush, working gently around the glass bulb and junction.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\n\u003cspan\u003eClean the conductivity probe with Conductivity Probe Cleaner and the chamois. Skip this cleaner entirely if your meter is a OnePen.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\n\u003cspan\u003eRinse both probes again in fresh tap water to remove all cleaner residue.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\n\u003cspan\u003eCalibrate the pH probe in the supplied cups: pH 7.0 solution first, then pH 4.0. Follow your meter's calibration prompts.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e6\u003c\/span\u003e\n\u003cspan\u003eDip the conductivity probe in 2.77 EC standard solution and check it reads 2.77. If it does, the clean worked.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e7\u003c\/span\u003e\n\u003cspan\u003eStore the pH probe with its tip wet in KCl storage solution until the next use.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003epH \u0026amp; EC Meters \u0026amp; Pens\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe pens and meters this kit keeps accurate — Bluelab and more.\u003c\/p\u003e\n\u003c\/a\u003e\n\u003ca href=\"\/collections\/ph-control-calibration-ph-ec\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003epH Control \u0026amp; Calibration\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eLarger bottles of calibration, storage and cleaning solutions for restocking.\u003c\/p\u003e\n\u003c\/a\u003e\n\u003ca href=\"\/collections\/water-control\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\n\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eWater Control\u003c\/strong\u003e\n\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eEverything for dialling in your reservoir — monitors, dosers and more.\u003c\/p\u003e\n\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes this kit work with all Bluelab pH and EC meters?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes, with one exception — the Conductivity Probe Cleaner is not compatible with the Bluelab OnePen (PENONE) or its Replacement Probe (PROBONE). The calibration sachets, KCl storage solution and pH Probe Cleaner suit the full Bluelab range, including pens, Combo Meters, Guardian Monitors and controllers.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need to calibrate my conductivity probe?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. Bluelab conductivity probes are factory calibrated and never need recalibrating. The 2.77 EC standard solution in this kit is for testing — dip the clean probe in it and if it reads 2.77, your probe is accurate.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I store my pH probe in distilled or RO water?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. Pure water pulls ions out of the glass bulb and reference junction, which causes drift and can permanently damage the probe. Always store pH probes with the tip wet in KCl storage solution — that is exactly what the KCl sachets in this kit are for.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow often should I service my probes?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eMonthly is Bluelab's recommendation for a full clean, calibrate and test. Clean sooner if readings look sluggish or your EC probe starts reading low — that is the tell-tale sign of build-up on the probe face.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWill this kit work on non-Bluelab meters?\u003c\/summary\u003e\n\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes, mostly. The pH 4.0 and 7.0 calibration solutions, 2.77 EC standard and KCl storage solution are standard reference solutions that suit most glass-bulb pH probes and EC meters. Check your meter's manual for its cleaning requirements before using the probe cleaners on other brands.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eYour Meter Is Only As Accurate As Its Probe Is Clean\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eOne kit, one monthly service, accurate readings all season. Free shipping over $499*.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop pH \u0026amp; EC Meters\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('52067198533930', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52067198533930,"sku":"BL-MTR-CAREKIT-PHCON","price":49.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/BL_CAREKITPHCON__Box_Contents_Image.png?v=1785337025"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/collections\/Group_49.svg?v=1738974891","url":"https:\/\/www.thegrowguys.com.au\/collections\/bluelab.oembed","provider":"The Grow Guys","version":"1.0","type":"link"}