Bluelab pH 4.0 Calibration Solution – 250 ml / 8.4 fl oz ice maker scale prevention the HI98330 GroLine® Nutrient Tester

the HI98330 GroLine® Nutrient Tester accurately measures the electrical conductivity (EC) in mS/cm and the total dissolved solids (TDS) conversion in parts per million (ppm) of the nutrients in water

Environmental water sampling

GroLine HI9814 portable pH/EC/TDS meter

This renewable junction design extends probe life and reduces replacement costs

Bluelab pH 4.0 Calibration Solution – 250 ml / 8.4 fl oz ice maker scale prevention the HI98330 GroLine® Nutrient TesterpH 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,