Liquid Hardness Increaser

Every body of water needs calcium in it.  Too little calcium, water is corrosive and will damage the spa.  Too much water will produce damaging and ugly scale.   When levels are ideal you will prolong the life of your spa and provides the best bather comfort.  If you have a softener, you need this product!   


  • Instantly becomes part of the water!
  • Compatible with all sanitizers and oxidizing systems


  • Prevents corrosion
  • Helps prevents foaming
  • Eliminates etching of delicate surfaces


  • Apply to the spa while the water is circulating or as it is being filled
  • 1 fluid ounce (2 Tbsp) per 500 gallons of water will raise calcium hardness level 6 ppm

Available Sizes

  • 16 ounces (12 per case)

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