pH Solution


A must have in every grower’s toolbox! Bluelab Calibration Solution is used to ensure that your testing equipment is working properly and giving accurate readings. All buffers are NIST certified and referenced to high laboratory standards.

Bluelab pH meters are calibrated to pH 7.0 first then to pH 4.0. The company’s conductivity/ TDS instruments are pre-set at the factory and do NOT need calibrating.

Available size: 500 mL Bottles

Grower’s Tip:
To prevent cross contamination, pour the necessary amount of buffer into a small container and calibrate from here. Discard when finished — do NOT reuse.