pH Calibration Solution by Bluelab - 4.0 & 7.0 Standard

🧪 Stay Accurate, Stay Ahead

If 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 & 7.0) are the exact tools for the job.

No 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.

🔹 Key Features

⚗️ 4.0 and 7.0 pH reference standards

🔬 Compatible with all Bluelab pH pens and meters

💧 Essential for monthly calibration and cleaning

🧴 Available in 250ml or 500ml bottles

🛠️ How to Use It

After 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.

🌟 Grow Guys Tips

Don’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.

🧪 Perfect For

Anyone 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.

📦 Specs & Stuff

• Types: 4.0 & 7.0 pH solutions

• Sizes: 250ml, 500ml

• Shelf-stable when sealed

• Use for calibration after every clean

• Compatible with all Bluelab pH products

🚀 Clean Probes, Clean Data, Clean Grows

Grab a bottle (or two) and keep your meters running like clockwork. Your plants will thank you - and so will your yield.