Frog SooTHe™ Total Hardness Increaser raises the total hardness level (also known as calcium hardness) of your hot tub or swim spa water. 

Includes the FROG TruDose Cap™ for precise, no-mess measuring.

Active Ingredient: 100% Calcium Chloride Dihydrate

Size: 2 lbs.

Frog SooTHe™ Total Hardness Increaser is compatible with all spa water sanitization systems including: silver ion/granulated chlorine systems, salt systems, granulated bromine, bromine tabs/floater systems, ozone, Frog @Ease, Frog Serene and Baqua Spa / Sirona Simply.