Spa Pure Hardness Increaser 16 oz ear-muffs 1-1/2"s is a replacement pool

1-1/2"s is a replacement pool part to keep your equipment running strong

Dermatologically safe foam is non-irritating

Pentair 194801 2-Inch Bulkhead Replacement Pool and Spa Filter

Viscosity @ 72°F (23°C):40

Spa Pure Hardness Increaser 16 oz ear-muffs 1-1/2"s is a replacement poolSpa 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