Puri Tech Chemicals Calcium Hardness Increaser 50lb for Swimming Pools & Spas

Pool Chemicals & Testing. Spa Chemicals & Sanitizers. Calcium Chloride. 2,000 Gallons: 1.5 Lbs to increase hardness 50ppm, 3 Lbs/100ppm, 6.25 Lbs/200ppm. 5,000 Gallons: 3 Lbs to increase hardness 50ppm, 6.25 Lbs/100ppm, 12.5 Lbs/200ppm.

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