FROG @ease System for Sundance Spas

The FROG @ease System for Sundance Spas uses the same proven FROG mineral formula and SmartChlor Technology to deliver clean, clear, and soft water while fitting conveniently in most filter cartridges designed for Sundance Spas. The @ease System uses a time-released method to use less chlorine that requires little maintenance and automatically adjusts output based on usage. This system includes 1 mineral cartridge (blue), 1 SmartChlor cartridge (silver) 1 Jump Start package and 1 bottle of @ease Test Strips. Designed to fit spas from the following series: Sundance 780 Sundance 880 Sundance 980   Mineral cartridges last 3-4 months based on hot tub usage and size. SmartChlor cartridges last 3-4 weeks based on hot tub usage and size.This means for a full 4 month supply, you will need 1 blue mineral cartridge and about 4 silver SmartChlor cartridges. Add a 3 Pack of SmartChlor Cartridges for a full 4 month supply! Use the Subscribe and Save feature to never run out of