SunGuard Calcium Hardness Increaser


SunGuard Calcium Hardness Increaser raises the calcium hardness of pool water to aid in the prevention of corrosion, etched plaster and other problems resulting from low calcium hardness. The ideal calcium hardness range is 200-400ppm for plaster pools and 175-225ppm for vinyl, fiberglass and painted pools.

Useful Tips

  • Test calcium hardness monthly and add this product if calcium hardness is below 200ppm
  • Use convenient dosage chart on product label.
  • If water is above 500ppm, drain some water and replace with fresh water that has a lower calcium hardness.

Available Sizes: 2 lbs. / 4 lbs. / 8 lbs. / 5 lbs. Ziploc bags /
10 lbs. Ziploc bags / 20 lbs. Ziploc bags / 25 lb. pails

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