FROG® @ease SmartChlor 3-Pack | Sundance Spas 780/880/980 Type_Pillow Together they cover the two

Together they cover the two things that actually determine whether spa water stays clear

Grid Diameter: 15 in / 38 cm

or live in a hard-water region with municipal water above 150 ppm

Dimensions 18" x 22 1/2"

FROG® @ease SmartChlor 3-Pack | Sundance Spas 780/880/980 Type_Pillow Together they cover the twoThe FROG @ease SmartChlor Cartridges for Sundance Spas (3 Pack) are the genuine refill cartridges for the @ease Sanitizing System custom designed for Sundance Spas. Each cartridge is the chlorine generating half of the @ease pair, sized and engineered to fit the Sundance cartridge holder not the universal floating dispenser, not the Bullfrog floater. This is the Sundance specific size. For most spa owners, SmartChlor cartridges are the most frequently