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Adjust calcium hardness to less than 400 ppm
hot tub or ornamental fountain
Sand Filters:
Operate as usual until a new charge is required
Haviland Hardness Plus 10# Adjust calcium hardness to lessThe Haviland Hardness Plus is a granular product that is designed to safely raise the calcium hardness levels in your pool water. Regular use of this product will stop and prevent the corrosion of your pool's surfaces. This product is compatible with all systems including bromine, chlorine, mineral sanitizers, and biguanide.
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