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Calcium Plus raises the calcium hardness of swimming pool water. The
ideal calcium hardness range is 200-500 ppm. Maintaining calcium hardness below
200 ppm may cause corrosion of metal and plaster surfaces.
Test calcium hardness monthly and add
this product if calcium hardness is below 200 ppm.
Use convenient dosage
chart on product label.
If a large amount of Calcium Plus is required (more
than a 50 ppm addition), add in 1/3 increments, allowing 4-6 hours between additions.