Low-chlorine spa sanitizing system maintains a consistent 0.5 – 1.0 ppm free chlorine level at all times
Minerals work to make water softer, gentler and conditioned
Shock only once a month and use up to 75% less chlorine
Floats in spa water and flips over when empty, indicating the SmartChlor cartridge needs replacing
Minerals last up to 4 months, SmarChlor cartridges last 3-4 weeks in spas up to 600 gallons

Frog @Ease Replacement SmartChlor Cartridge 3 Pack