{"product_id":"ph-up-and-down-set-by-growth-technology","title":"pH Up \u0026 Down Set by Growth Technology — Matched pH Adjuster Pair, 250ml or 1L","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;\"\u003eSooner or later every hydroponic grower overshoots the pH in one direction and needs to come back the other way. This set puts both of Growth Technology's adjusters on the shelf together: pH Up (potassium hydroxide 480 g\/L) to raise a solution, and pH Down (phosphoric acid 85% w\/v) to lower it, in matching 250ml or 1L bottles for less than buying them one at a time. Both are dosed with a dropper after the nutrient is mixed, using Growth Technology's test, add, stir, retest method, with a target of 5.5–6.5 for their hydroponic and coco nutrients. Both are Schedule 6 poisons and Class 8 corrosives, so gloves and eye protection come with the territory.\u003c\/p\u003e\n\u003cdiv style=\"background: #fff3e0; border-left: 4px solid #e65100; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cstrong style=\"color: #e65100;\"\u003eDangerous goods: road freight or pickup.\u003c\/strong\u003e Both bottles are Class 8 corrosives and can't travel by standard post. Online orders go by dangerous-goods road courier at a separate freight charge that isn't included in free shipping over $499*, and delivery may take longer. We'll contact you after you order to confirm. Prefer to skip the freight? Choose pickup from our Invermay store or local delivery at checkout.\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border: 1px solid #c8dfc8; border-radius: 8px; padding: 1.2rem 1.4rem; margin-bottom: 2rem;\"\u003e\n\u003cstrong style=\"display: block; color: #2e5e2e; font-size: 1rem; margin-bottom: 0.8rem;\"\u003eWhat's in the set\u003c\/strong\u003e\n\u003cstrong style=\"display: block; color: #2e5e2e; font-size: 0.95rem; margin: 0 0 0.4rem;\"\u003e250ml Pair\u003c\/strong\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 1rem; padding: 0.45rem 0; border-bottom: 1px solid #dceadc; font-size: 0.93rem;\"\u003e\n\u003cspan\u003epH Up 250ml — raises pH\u003c\/span\u003e\u003cspan\u003e$15.95\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 1rem; padding: 0.45rem 0; border-bottom: 1px solid #dceadc; font-size: 0.93rem;\"\u003e\n\u003cspan\u003epH Down 250ml — lowers pH\u003c\/span\u003e\u003cspan\u003e$15.95\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 1rem; padding: 0.7rem 0 0; font-size: 0.95rem;\"\u003e\n\u003cspan\u003eBought separately\u003c\/span\u003e\u003cspan\u003e$31.90\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 1rem; padding: 0.3rem 0 0; font-size: 1rem; color: #2e5e2e;\"\u003e\n\u003cstrong\u003e250ml Pair — you save $1.95\u003c\/strong\u003e\u003cstrong\u003e$29.95\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cstrong style=\"display: block; color: #2e5e2e; font-size: 0.95rem; margin: 1.2rem 0 0.4rem;\"\u003e1L Pair\u003c\/strong\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 1rem; padding: 0.45rem 0; border-bottom: 1px solid #dceadc; font-size: 0.93rem;\"\u003e\n\u003cspan\u003epH Up 1L — raises pH\u003c\/span\u003e\u003cspan\u003e$35.95\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 1rem; padding: 0.45rem 0; border-bottom: 1px solid #dceadc; font-size: 0.93rem;\"\u003e\n\u003cspan\u003epH Down 1L — lowers pH\u003c\/span\u003e\u003cspan\u003e$39.95\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 1rem; padding: 0.7rem 0 0; font-size: 0.95rem;\"\u003e\n\u003cspan\u003eBought separately\u003c\/span\u003e\u003cspan\u003e$75.90\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 1rem; padding: 0.3rem 0 0; font-size: 1rem; color: #2e5e2e;\"\u003e\n\u003cstrong\u003e1L Pair — you save $3.95\u003c\/strong\u003e\u003cstrong\u003e$71.95\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\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;\"\u003eBoth directions covered\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eOvershoot on the way down and pH Up brings it back. Fresh mix sitting high and pH Down sorts it. One order, no waiting on the second bottle.\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 two singles\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eThe 250ml pair saves $1.95 and the 1L pair $3.95 on the single-bottle prices.\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;\"\u003eMatching sizes\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eTwo 250ml bottles for a tent or a few reservoirs, two 1L bottles for bigger systems. One size choice, both bottles.\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;\"\u003eBuilt for GT nutrients\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eGrowth Technology's Ionic and GT Coco directions both finish with a test and adjust to pH 5.5–6.5. These are the same maker's tools for that step.\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;\"\u003eNutrients, not fillers\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003epH Up leaves potassium in the tank and pH Down leaves phosphate, both minerals plants use.\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;\"\u003eSame bottles as the singles\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eEach set is the standard pH Up and pH Down bottles, not a different formula.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #fbf1ef; border-left: 4px solid #c0392b; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem; font-size: 0.93rem; line-height: 1.65;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #c0392b;\"\u003eRead before you buy\u003c\/strong\u003e\nPoison S6, both bottles. pH Up is potassium hydroxide 480 g\/L (UN 1814) and pH Down is phosphoric acid 85% w\/v (UN 1805); both are Class 8 corrosive dangerous goods. Growth Technology warns pH Up may cause severe burns and attacks skin and eyes. Wear protective gloves and eye and face protection, keep both bottles in a secure, well-ventilated place out of reach of children, and never pour one into the other. \u003cstrong\u003eFirst aid:\u003c\/strong\u003e contact the Poisons Information Centre on 13 11 26 or a doctor at once. If swallowed, do not induce vomiting; give a glass of water. Eyes: hold the lids apart and flush with running water for at least 15 minutes, then see a doctor. Skin or hair: remove contaminated clothing and flush with running water.\n\u003c\/div\u003e\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eSpecifications\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Growth Technology\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e pH adjuster pair\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIn the 250ml Pair:\u003c\/strong\u003e pH Up 250ml and pH Down 250ml\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIn the 1L Pair:\u003c\/strong\u003e pH Up 1L and pH Down 1L\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Up contains (label):\u003c\/strong\u003e Potassium hydroxide 480 g\/L\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003epH Down contains (label):\u003c\/strong\u003e Phosphoric acid 85% w\/v\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDose:\u003c\/strong\u003e No fixed rate: add drop by drop, test, repeat\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTarget pH:\u003c\/strong\u003e 5.5–6.5 for Growth Technology hydroponic and coco nutrients\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWhen to adjust:\u003c\/strong\u003e Last, after nutrients and additives are mixed and settled\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePoisons schedule:\u003c\/strong\u003e S6, both bottles\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDangerous goods:\u003c\/strong\u003e Class 8 corrosive: UN 1814 (pH Up), UN 1805 (pH Down)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProtective equipment:\u003c\/strong\u003e Gloves, eye and face protection\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Secure, well-ventilated place, out of reach of children\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDelivery:\u003c\/strong\u003e Dangerous-goods road courier at a separate freight charge, store pickup or local delivery\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eGrower's Tip\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 0;\"\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 pen first. Both bottles are only as good as the reading you are chasing.\u003c\/li\u003e\n\u003cli\u003eAdjust last, after the nutrient and additives are mixed and settled.\u003c\/li\u003e\n\u003cli\u003eOne drop at a time, stir, retest. Both are concentrated and overshoot fast.\u003c\/li\u003e\n\u003cli\u003eKeep a separate dropper for each bottle and label them. Never pour one into the other.\u003c\/li\u003e\n\u003cli\u003eWrite down drops per litre for each mix. After a couple of rounds you will know your starting dose.\u003c\/li\u003e\n\u003cli\u003eStore both locked away and capped. They are Schedule 6 poisons and corrosives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eHow To Use It\u003c\/h2\u003e\u003c\/summary\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: 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\u003eMix your nutrients and any additives into the reservoir, stir well and let the solution settle.\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\u003eTest the pH with a calibrated pen or meter.\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\u003ePut on gloves and eye protection. If the reading is too low, add pH Up with its own dropper; if it is too high, add pH Down with its own dropper. Count the drops and stir.\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\u003eRetest. Repeat until the solution reaches your target pH, which is 5.5–6.5 for Growth Technology's hydroponic and coco nutrients.\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\u003eWrite down which bottle and how many drops per litre it took, for next time.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003ePairs Well With\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem;\"\u003e\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\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003epH Calibration Solution by Bluelab\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH 4.0 and 7.0 standards. A pen that hasn't been calibrated makes every drop of pH adjuster a guess.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/ionic-grow-by-growth-technology\" 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;\"\u003eIonic Grow by Growth Technology\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eOne-bottle hydroponic nutrient. Growth Technology's direction: mix it, then test and adjust to pH 5.5–6.5.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/coco-grow-a-b-set-by-growth-technology\" 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;\"\u003eGT Coco Grow A\u0026amp;B by Growth Technology\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eTwo-part coco nutrient with the same 5.5–6.5 pH target, adjusted last.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/silica-by-growth-technology\" 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;\"\u003eSilica by Growth Technology\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003ePotassium silicate is alkaline and lifts the pH of the mix. pH Down brings it back into 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;\"\u003eMeters \u0026amp; Pens – pH \u0026amp; EC Testing\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003epH and EC pens to test the solution before and after every adjustment.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\u003c\/summary\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 in the pH Up \u0026amp; Down Set?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eOne pH Up and one pH Down from Growth Technology, both 250ml in the 250ml Pair or both 1L in the 1L Pair.\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 it cheaper than buying them separately?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The 250ml Pair is $29.95 against $31.90 for two singles, and the 1L Pair is $71.95 against $75.90.\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 these dangerous?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Both are Schedule 6 poisons and Class 8 corrosives. Wear gloves and eye and face protection every time, and keep them locked away.\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 much do I use?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThere is no fixed rate. Add a small amount with a dropper, counting the drops, stir, retest and repeat until you hit your target, then record the drops per litre.\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 I aim for?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003e5.5–6.5 for Growth Technology's hydroponic and coco nutrients.\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 you post the set to me?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNot by standard post. Both bottles are dangerous goods, so online orders go by dangerous-goods road courier at a separate freight charge, not included in free shipping over $499*. We contact you after you order to confirm. Pickup from our Invermay store and local delivery are also available.\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 buy different sizes, like a 1L pH Down and a 250ml pH Up?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNot as a set. Buy the singles separately in whatever sizes you want.\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 do I do if either gets on my skin or in my eyes?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eSkin: remove contaminated clothing and flush with running water. Eyes: hold the lids apart and flush with running water for at least 15 minutes, then see a doctor. For anything more, call the Poisons Information Centre on 13 11 26.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/details\u003e\n\u003cdiv style=\"margin: 2rem 0 0;\"\u003e\n\u003cp style=\"font-size: 0.95rem; font-weight: 700; 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=\"53041746116906\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #2e5e2e; color: #fff; font-size: 0.95rem; font-weight: 700; cursor: pointer;\"\u003e250ml Pair\u003c\/button\u003e\n\u003cbutton data-variant-id=\"53041746149674\" 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;\"\u003e1L Pair\u003c\/button\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 0;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eBoth directions, one order\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eCorrosive, so it travels by dangerous-goods road freight or pickup in Invermay. We'll call to confirm online orders.\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 All pH Control\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\n  var selectedVariantId = '53041746116906';\n\n  var variantBtns = document.querySelectorAll('button[data-variant-id]');\n  variantBtns.forEach(function(b) {\n    b.addEventListener('click', function() {\n      selectedVariantId = this.getAttribute('data-variant-id');\n      variantBtns.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","brand":"Growth Technology","offers":[{"title":"250ml Pair","offer_id":53041746116906,"sku":"GT-PH-SET-250ML","price":29.95,"currency_code":"AUD","in_stock":true},{"title":"1L Pair","offer_id":53041746149674,"sku":"GT-PH-SET-1L","price":71.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/pH-Up-and-Down-by-Growth-Technology-Precision-pH-Control-3.png?v=1754799337","url":"https:\/\/www.thegrowguys.com.au\/products\/ph-up-and-down-set-by-growth-technology","provider":"The Grow Guys","version":"1.0","type":"link"}