Bluelab pH 4.0 Calibration Solution – 250 ml / 8.4 fl oz aquarium iodine test and contaminants that affect accuracy

and contaminants that affect accuracy and response time—ensuring your pH and ORP measurements remain fast

place the CLEAR plastic cap (supplied with probe) over the membrane

digital readout is fast and accuracte and best of all is environmentally friendly with NO mercury

Model Number: 1-41500-W

02 pH at 25°C

Bluelab pH 4.0 Calibration Solution – 250 ml / 8.4 fl oz aquarium iodine test and contaminants that affect accuracypH 4. 0 calibration solution a must in every grower's toolbox Contains 1 bottle 250 ml 8. 4 fl oz Boost your pH products longevity with regular cleaning and calibration Bluelab pH 4. 0 Calibration Solution ensures accurate pH meter readings with lab grade precision. This 250 ml bottle delivers consistent calibration for refractometers, pH meters, and water quality testing equipment. Essential for maintaining measurement accuracy in hydroponic systems,