Hardness Increaser

Used to raise Hardness levels. The scientific name is Calcium Chloride. Calcium Chloride is typically packaged and sold as "Hardness Increaser," "Hardness Up," or "Hardness Plus." Calcium Chloride is granular. Read the instructions on the label to determine the amount to add, how it should be added (either diluted in water or broadcast straight from the container), a maximum amount (per 10,000 gallons of water) that can be added at one time, and other precautions. Note: There is no product that is packaged and sold as a Hardness Decreaser. If your Hardness level is too high, you will have to drain your pool, either partially or completely, in order to lower the Hardness level.

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