Tired of guessing how much chlorine your spa needs? The FROG® Ease In-Line SmartChlor® Cartridge takes the stress out of hot tub care. Designed for convenience and performance, this cartridge works seamlessly with the FROG® Ease In-Line Mineral Cartridge for Hot Tubs to give you clean, silky water that feels amazing every time. With the FROG® Ease SmartChlor® Hot Tub Cartridge, you’ll use up to 75% less chlorine—no mess, no measuring, no strong odors. Looking for the best mineral cartridge for hot tubs? The FROG® Mineral Cartridge for Spa is your go-to for long-lasting freshness. The FROG® Hot Tub Cartridge delivers powerful sanitation with minimal effort. Whether it’s the FROG® Mineral Cartridge Hot Tub or the trusted FROG® Ease In-Line Spa Mineral Cartridge, this system keeps your spa water clean and clear for weeks. Stop struggling with complicated chemicals. Choose the Spa FROG® Ease In-Line SmartChlor® Cartridge and enjoy spa water that works for you—effortlessly.