Calcium Hardness Increaser



Product Description

Raises water hardness level while preventing foaming and equipment corrosion.



  • Increases water hardness
  • Helps prevent corrosion


By maintaining proper hardness levels, the life of the spa will be extended.


As Needed:
One ounce raises the calcium hardness 7 ppm in 500 gallons of water.

  1. Determine amount of product to be added. The ideal hardness level is 150-400 ppm.
  2. Turn jets ON to circulate spa water.
  3. Pour required amount into the water.
  4. Run filter for 1 to 2 hours.
  5. Retest water to ensure proper level.
  6. Repeat steps 1-5 until proper level is obtained.

Compatible With:

Chlorine, bromine, ozone and biguanide sanitizers.

Additional Information


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