Spa Pure Hardness Increaser 16 oz

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Spa 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 to prevent scale buildup. scale. If you are adding soft water to your hot tub, replace the calcium as soon as possible. Water softeners take calcium from the water and can cause damage and corrosion to the equipment. Show more