FROG @Ease Floating Sanitizing System uses SmartChlor Technology to give you cleaner and softer fresh mineral water that uses up to 75% less chlorine. For hot tubs up to 600 galloons Uses SmartChlor Technology Effectively kills bacteria with up to 75% less chlorine* than ordinary systems No daily or weekly maintenance No faded swimwear, chlorine smell, or mess Includes: FROG Jump Start shock & 30 FROG @ease test strips Replace every 4 months or when draining hot tub FROG @Ease Floating Sanitizing System uses SmartChlor Technology with proven FROG mineral formula to kill bacteria for hot tubs up to 600 gallons. The SmartChlor Technology is a self-regulating chlorine that uses up to 75% less chlorine than ordinary systems for continuous crystal clear water and less odor. The FROG @ease Floating System comes with two replaceable cartridges: Blue Cartridge: FROG @ease Mineral Cartridge Silver Cartridge: FROG @ease SmartChlor Cartridge The cartridges are pre-filled which makes maintenance very easy and eliminates the stress of guessing. This system only requires shock once a month! SmartChlor cartridge lasts up to 4 weeks depending on hot tub usage. Recyclable when empty. The Mineral Cartridge lasts 4 months or whenever you drain your hot tub. No daily or weekly maintenance is needed.