Caribbean Spa
Spa Calcium Increaser
Water desires metals, so calcium is very important. If your calcium levels are too low, a small addition of Hardness Increaser brings the levels up safely while not clouding the water. When levels are ideal, you will prolong the life of your spa.
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  • Helps prevents foaming and equipment corrosion


  • Helps maintain Calcium Hardness levels between 150-300 ppm
  • Made in the USA


  • Apply to the spa while the water is circulating or as it is being filled
  • Add 1 ounce (2 tablespoons) for every 500 gallons of water to increase calcium hardness 10 ppm.

Available Sizes

  • 16 oz. bottles