DescriptionKeep your Calcium Hardness at proper levels at all times to help protect your pool, water, and pool equipment. The Calcium Hardness level in a pool does not increase rapidly, but it is good practice to check the Calcium Hardness every month. Adding 1-1/4 pounds of Hardness Plus to 10,000 gallons of water will raise the Calcium Hardness by 10 ppm.
**The minimum level of Calcium Hardness is 150 ppm. Back to Top
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