TheseFROG @ease In-Line Spa SmartChlor Sanitizing Replacement Cartridges area unique form of chlorine that work 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.

• Pack includes 3 cartridges
• Replacement SmartChorCartridges for the FROG@ease In-Line Spa System
• SmartChlorCartridge 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
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