Cal Treat™


Removes 200-400ppm calcium hardness in pools with D.E. filters. Guaranteed.

  • Only way to lower hardness without draining
  • Safe for all surfaces
  • Removes scaling

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100% Performance Guaranteed

All our products are backed by a 100% Performance Guarantee. If this product doesn’t solve your problem we’ll send you what you need for free or a full refund.

Additional information

Weight 2.5 lbs
Dimensions 3.25 × 3.25 × 9.25 in

Questions & Answers

  1. 0 votes

    You can get it to work if you add a filter aid. However, it only works consistently with D.E. filters. 

  2. 0 votes

    According to the website, it says it will filter down to the same number of microns as D.E. So in theory it should work. If you go ahead this route, open a ticket and let us know your results so we can add it to our recommendations. We'll also back it with our guarantee in case it doesn't work.

  3. 0 votes

    Great question. You add CalTreat directly to the pool water. If there's any scale present it will remove that first.

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