Aqua Medic pH Calibration Fluid 60mL - Premium pH Buffer Solution for Aquariums, Hydroponics & Lab Use

The accuracy of all electrodes is dependent upon their calibration. To ensure accurate readings, all electrodes need to be calibrated at regular intervals. To ensure that the fluid values used to calibrate the electrodes remain constant, regular replacement of these fluids should occur.

The pH calibration fluids come in 3 variations

pH 4

pH 7

pH 9