Frog SooTHe™ Total Hardness Increaser for Hot Tubs & Swim Spas 2lbs @ease The purple and green are

The purple and green are high capacity 7

the face cards are still visible

including salt systems

If your swim spa is NOT an ENDLESS POOLS® brand swim spa

You can find the FROG @ease SmartChlor® Replacement Cartridge 3pk for the Hot Tub Floating System here

Frog SooTHe™ Total Hardness Increaser for Hot Tubs & Swim Spas 2lbs @ease The purple and green areFrog 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