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SpaGuard Calcium Hardness Increaser - 12 oz.

SpaGuard Calcium Hardness Increaser - 12 oz.


SpaGuard Calcium Hardness Increaser - 12 oz.

SKU: 42636BIO

Low stock

SpaGuard Calcium Hardness Increaser - 12 oz.


SpaGuard Calcium Hardness Increaser is used to increase spa water hardness. Spa water containing low levels of calcium will etch plaster 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 SpaGuard Calcium Hardness Increaser - 12 oz.


  • Prevents corrosion of equipment due to low calcium hardness.
  • Prevents etching of plaster due to low calcium hardness.

Directions For Use

  1. Apply appropriate amount of product per ALEX Pro recommendations. Broadcast into spa with the circulation system operating.
  2. Do not pre-dissolve.
  3. Brush up any granules that do not immediately dissolve.
  4. Operate circulation system for 30 min. after application.


      • Compatible with chlorine, bromine, ozone and biguanide sanitizers.



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