Freshwater™ pH / Alkalinity DOWN 1.5 lbs. - Alkalinity and pH Decreaser Hot Spring Cold Plunge filter The SunPurity will release silver

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

Active Ingredient: 95% Sodium Bisulfate

The Tropic Seas Spas™ 35 Sq Ft

Height: 10 3/4"

The granular formulation will gradually increase water hardness which will help prevent the corrosion of equipment and foaming caused by soft water

Freshwater™ pH / Alkalinity DOWN 1.5 lbs. - Alkalinity and pH Decreaser Hot Spring Cold Plunge filter The SunPurity will release silverFreshwater 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