Keep your swim spas in ready for use condition with FROG @ease SmartChlor Cartridge. The FROG @ease SmartChlor Replacement Cartridge for Swim Spas is engineered for swim spas up to 3,000 gallons. This cartridge pack delivers top-tier swim spa sanitization, ensuring clear, clean and inviting water all year. Experience the benefits of FROG's SmartChlor within each cartridge replacement, formulated to work with FROG mineral cartridges for swim spa sanitizing systems. This combination eradicates organic contaminants through two mechanisms and reduces traditional swim spa chlorine use, lowering your overall spa chemical needs. Enjoy softer water that minimizes skin irritation, prevents swimsuit fading and protects swim spa surfaces from chemical wear. FROG's swim spa replacement cartridges are water care essentials that simplify maintenance with their prefilled design, eliminating the need to measure, handle or store chemical granules and powders. Each cartridge in this care system lasts 3 to 4 weeks, providing self-regulating, automatic water treatment without frequent replacements. The floater system ensures steady chlorine release, keeping water clear while reducing chlorine odors. As part of this innovative floating sanitizing system, the cleaning cartridge ensures your swim spa receives consistent, reliable water treatment. Choose FROG’s cartridge pack for a more efficient, easy-to-manage treatment. FROG @ease does not contain cyanuric acid. The CDC recommends not using cyanuric acid or chlorine products with cyanuric acid in hot tubs/spas. For more than 25 years, FROG has sanitized pools, hot tubs and swim spas with its innovative, patented Mineral Technology that makes water care easier. FROG's prefilled cartridges mean no mess, no guess and no stress water care for your pools, hot tubs and swim spas. Each FROG product helps make your water cleaner, clearer, softer and easier. No matter what size pool, hot tub or swim spa you have, FROG has a solution for it.