Natural Chemistry Calcium Hardness

$11.99

1.75 lb Bottle of Natural Chemistry Calcium Increaser

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Natural Chemistry’s Spa Calcium Hardness Increaser is used to raise calcium hardness in spa water. Calcium hardness in spa water should be maintained between 150-250 ppm. Low calcium hardness levels could cause the spa water to be corrosive which may result in damage to the spa surface or equipment.