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Leisure Time Calcium Booster - 1 Qt.


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Leisure Time Calcium Booster - 1 Qt.


Leisure Time Calcium Booster is used to increase spa water hardness. Spa water containing low levels of calcium will etch plater and corrode equipment. Low calcium levels will also cause spa or hot tub water to foam. Maintaining a hardness level will help protect your spa from these harmful effects. 

What’s in the Box

  • 1 x Leisure Time Calcium Booster - 1 Qt.



  1. Clean your spas surfaces, back-flush and clean filters.
  2. Test spa water. 
  3. Add appropriate amount of Calcium Booster.
  4. 1 oz per 500 gallons of water will raise calcium hardness 7ppm

Weekly Maintenance:

  1. Using spa test strips, test your spas water and adjust when needed.
  2. Ideal Range for alkalinity level: 80 - 120 ppm.
  3. Ideal Range for pH level: 7.2 - 7.8.
  4. Ideal Range for Calcium Hardness: 150 - 400 ppm.


    • Compatible with chlorine, bromine, ozone and biguanide sanitizers


    Leisure Time®

    Most products purchased from our online shop within the last 30 days can be returned.

    The following items are non-returnable:

    • Gift cards
    • Electronics
    • Pumps / Motors
    • Hot Tubs
    • Closeouts
    • See return policy below for made-to-order/special-order return eligibility.
    30-day returns* Free shipping above $75