pH 7.0 calibration solutions - a must in every grower's toolbox

Bluelab pH 7.0 Calibration Solution is essential for use with all Bluelab pH products. All Bluelab solutions are manufactured specifically for Bluelab products and are referenced to high laboratory standards to ensure your Bluelab products last longer and maintain accuracy. 

Luckily, the easy-to-follow calibration process is the same for all Bluelab pH meters and pens.  

After cleaning your pH probe, you’ll need to calibrate it with pH calibration solutions at two reference standards - 4.0 and 7.0 pH. Once calibrated, you can start measuring pH again immediately. You’ll need to recalibrate whenever you clean your pH probe and when your meter alerts you that a calibration is needed. 

Available in 250 ml and 500 ml Bottle. 20 ml sachets are currently out of stock.