ThisFROG @ease In-Line Spa SmartChlor Sanitizing Replacement Cartridgeis a unique form of chlorine that works only with FROGminerals in the FROG@ease In-Line Spa System.ItusesSmartChlorTechnology that creates Fresh Mineral Waterand uses up to 75% less chlorine, with no frustrating yo-yo chlorine levels.

• Replacement SmartChor Cartridge for the FROG @ease In-Line Spa System
• SmartChlor Cartridge lasts up to 3-4 weeks depending on hot tub usage and is recyclable when empty
• Maintains a consistent 0.5-1.0 ppm free chlorine level at all times which means no faded swimwear and no chlorine smell
• When theSmartChlorCartridge is depleted, the system will flip over as a visual reminder to replace the empty cartridge with a new one
• Shock your spa only once a month
• Self-regulates for continuous cryst