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HTH Granule Calcium Hardness Increaser 4 lb
HTH Granule Calcium Hardness Increaser 4 lb
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HTH Pool Care Calcium Up 4lb. Raise the calcium hardness of your swimming pool water to protect your pool surfaces and equipment from harm. Protects pool surfaces. Helps chlorine work efficiently, Prevents equipment damage. Maintain calcium hardness levels between 200 and 500 ppm. Compatible with all swimming pool types.