Home Testing and Monitoring Water Test Kits Total Hardness Test KW-K102092 (2 Reagent Drop Test) Replaces KW13 and KW14
Replaces KW13 and KW14 2 reagent Drop Test10 ppm calcium carbonate (hardness) per drop. Typical accuracey +/- 10 ppmCount the number of drops to turn the water from red to blue.10 drops is 100 mg/l (ppm) CaCo3.