About this item Hot Tub Sanitizing System: FROG @ease Floating System floats when working, flips when empty; its perfect for hot tubs up to 600 gallons; replace the Mineral Cartridge only once every four months and the SmartChlor Cartridge every 3 to 4 weeks Innovative Technology for Clean Water: FROG @ease combines our patented mineral formula with SmartChlor Technology to create clean, silky soft Fresh Mineral Water in your hot tub Easy Hot Tub Maintenance: FROG @ease self-regulates for continuous crystal clear water and eliminates the peaks and valleys of traditional sanitizing methods; easily check when a SmartChlor Cartridge replacement is needed with the one color match on the included FROG @ease Test Strips Hot Tub Sanitization: With FROG @ease, you use up to 75%* less chlorine, making the water easier on skin, swimsuits and your hot tub’s surfaces; patented Mineral Technology sanitizes water and helps keep pH balanced Water Care Expertise: FROG has more than 25 years of experience making water care easier & keeping pool, hot tub and swim spa water sanitized; FROG’s patented Mineral Technology and prefilled cartridges create cleaner, clearer, softer water › See more product details