Low calcium levels got you down? Not to worry! The SpaGuard Calcium Hardness Increaser is here to help. With its simple, effective granular formula, you can say goodbye to harmful corrosion and scale buildup in no time.

And here’s another cool thing, it plays nice with other SpaGuard products. Whether it’s the Alkalinity Increaser or pH Decreaser, this Calcium Hardness Increaser fits perfectly into your spa maintenance routine, especially when you’re dealing with soft source water.

The best part? This awesome granular formulation not only boosts your calcium hardness effectively, but it also protects your plumbing, jets, fixtures, and tub surfaces from all the wear and tear associated with calcium levels below 100 ppm.

  • 1 tbsp per 100 gallons of water will raise hardness by 25 ppm.

Additional information

Weight 1 lbs
Dimensions 2.5 × 2.5 × 8 in
Spa Chemical System


Spa Chemical Type

Calcium Hardness Products



SpaGuard Calcium Hardness Increaser


19 in stock

19 in stock

SKU 42636BIO Category

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