* Eliminates organic contaminants 2 ways with a low level of chlorine and FROG Sanitizing Minerals. Minerals last 4 months, SmartChlor lasts up to 4 weeks depending on hot tub size and use; floats when working, flips when empty, ideally for hot tubs up to 600 gallons * FROG @ease uses SmartChlor, a patented chlorine formula that adds a low level of chlorine only when needed. Combined with FROG Sanitizing Minerals, FROG @ease creates Fresh Mineral Water for continuous crystal clear water and peace of mind * You use up to 75% less chlorine* with FROG @ease, making water easier on skin, hair, swimsuits, and your hot tub’s surfaces. FROG sanitizing minerals eliminates organic contaminants, condition the water for softness, and absorb acid to help keep pH balanced. * Includes 2 Prefilled Cartridges (1-mineral, 1-chlorine), 30 Frog Test Strips a Frog Jump Start Shock packet. Note: Due to Hazmat regulations this item can only be shipped via ground transportation