Bluelab - pH Calibration Solution


Size: pH 4.0 - 250ml
Sale price£9.99

Bluelab pH Calibration Solution

Keeping your pH meter calibrated is essential for taking accurate readings and keeping your nutrient solution within the correct pH range. Bluelab's pH Calibration Solution allows you to accurately calibrate your pH meter.

Check out our complete water conditioning toolkits, which come with an EC meter, pH meter, pH up & down, pH buffer, chlorine neutraliser, jug and syringes - click here to learn.

How pH Calibration Solution Works

pH meters need to be calibrated regularly to maintain accurate readings of the acidity of your nutrient solution. Bluelab's pH Calibration Solution has a stable pH for calibrating your meter. Choose between pH 4.0 and pH 7.0 versions depending on the requirements of the particular meter.


Choose from 250ml and 500ml versions. Available in pH 4.0 and pH 7.0.


  • Choose between pH 4.0 and pH 7.0 versions
  • Use regularly to keep you pH meter calibrated
  • Helps to ensure accurate readings
  • Can be used with any brand of pH meter

How To Use

How to Use Vitalink Calibration Fluid

Check out the One Stop Grow Shop Blog to find out how to get pH right in hydroponics. You'll also find information on calibration and the availability of nutrients at different pH ranges.

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