Keep your hot tub water clean and effortless with the FROG® SmartChlor® Replacement Cartridges 3-Pack. Designed for use with the FROG @ease® Floating System, each cartridge self-regulates to maintain a consistent, low level of chlorine for up to 3–4 weeks. The result is crystal-clear water that’s gentler on skin, hair, swimsuits, and spa surfaces—without daily monitoring or guesswork.