SpaPure Hardness Increaser 16oz.

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SpaPure Hardness Increaser is a highly effective spa treatment for raising calcium hardness levels in your spa water. It contains a granular formula which provides lasting protection against corrosion and is suitable for all types of sanitizers, including bromine, chlorine, minerals, and biguanide. Enjoy improved water quality and peace of mind with SpaPure Hardness Increaser.