Freshwater™ pH / Alkalinity DOWN 1.5 lbs. - Alkalinity and pH Decreaser Hot Spring Cold Plunge filter This filter fits the following

This filter fits the following Endless Pools Swim Spa models:

Caldera® Utopia Series:

The SunPurity will release silver ions automatically  and reducing your need for sanitizer such as chlorine or bromine

Prevents surface staining and spa water discoloration with routine use

Freshwater™ pH / Alkalinity DOWN 1.5 lbs. - Alkalinity and pH Decreaser Hot Spring Cold Plunge filter This filter fits the followingFreshwater pH Alkalinity Down lowers the total alkalinity levels and the pH in your spa water to increase the effectiveness of your sanitizer as well as reduce the chance of equipment corrosion. Active Ingredient: 95% Sodium Bisulfate Size: 1. 5 lbs. Freshwater pH Alkalinity Down is compatible with all spa water sanitization systems including: silver ion granulated chlorine systems, salt systems, Frog @Ease, Frog Serene, granulated bromine, bromine