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Baqua Spa Calcium Increaser

BAQUA SPA Calcium Hardness Increaser (14 oz) is designed to raise the calcium hardness of your hot tub water. Calcium Hardness levels should be maintained between 200-400 ppm.

Product Dosage

4 ounces per 100 gallons of water to raise calcium 40 ppm.


  1. Test your water's calcium hardness every week with Baqua Spa Test Strips and adjust accordingly.
  2. Add appropriate amount of Baqua Spa Calcium Hardness Increaser as designated in table on bottle to maintain the spa water calcium hardness within the 200-400 ppm range.
  3. Circulate spa water at high speed for a minimum of 15 minutes.