Spa Pure Hardness Increaser 16 oz ear-muffs and offered in both natural

and offered in both natural and propane gas models

Viscosity @ 72°F (23°C):40

flexibility

Dermatologically safe foam is non-irritating

Spa Pure Hardness Increaser 16 oz ear-muffs and offered in both naturalSpa Pure Hardness Increaser Booster (Calcium Hardness Increaser) increases the overall hardness of your spa or hot tub water. Low calcium hardness can corrode the heater and damage the spa surface, and can also contribute to excessive foaming. High calcium hardness can cause scale buildup and cloudy water. The high water temperature of a spa makes it harder for calcium to stay in solution, so it is recommended to use Stain and Scale Preventer weekly