FreshWater Stain and Scale Defense


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FreshWater Stain and Scale Defense is a liquid formula designed for use in spas and hot tubs to prevent scale formation caused by calcium. It also eliminates iron and other metallic staining in your hot tub and helps keep your equipment running smoothly.

SKU: 80042 Categories: , Brand:


Elements in your hot tub such as pump seals, plumbing, heaters, and surfaces can calcify since they are continuously exposed to calcium present in spa water. If left unchecked over time, this can lead to damage of your spa’s equipment and staining of surfaces. Use FreshWater Stain and Scale Defense on a regular basis to effectively prevent calcium formation and reduce existing buildup. It’s compatible with chlorine, bromine, ozone and biguanide sanitizers.


  • Using the Chlorine Test Strip dip strip in spa water.
  • Using the chart on the back of bottle compare results.
  • Add 2 oz of Defender per 800 gallons of water.
  • Circulate spa or hot tub water for 1 hour.

Weekly Maintenance:

  • Using spa test strips, test your spas water and adjust when needed.
  • Add 2 oz of FreshWater Stain & Scale Defense per 800 gallons of water.
  • Ideal Range for alkalinity level: 80 – 120 ppm.
  • Ideal Range for pH level: 7.2 – 7.8.






Product Type

Stain & Scale


16 oz bottle


Protect spa surfaces & prevent calcium build-up, stains, and scale


2 oz weekly

Sanitizer System

Bromine, Chlorine

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