FROG Serene Replacement Mineral Cartridge with 4 Replacement Bromine Cartridges for use with Hot Tub FROG Serene Floating Sanitizing System - Prefilled for Quick & Easy Hot Tub Maintenance

Keep your hot tub in great condition and ready for use with FROG Serene Replacement Mineral and Bromine Cartridges. The FROG Serene cartridges are your ultimate solution for maintaining pristine hot tub water. This comprehensive spa chemicals package includes 4 bromine cartridges and 1 sanitizing minerals cartridge that fit in the FROG Serene floating holder. Experience the benefits of a dual-action sanitizer that destroys organic materials with a combination of low-level bromine (about 1.0 ppm) and FROG sanitizing minerals. This hot tub floater not only keeps your spa water clean and uses less chlorine but also makes it gentler on your skin and swimsuits. By using up to 50% less bromine*, FROG Serene ensures a more comfortable and enjoyable hot tub experience while protecting your spa’s surfaces. Designed for convenience, FROG Serene features prefilled cartridges that allow for quick and easy replacement, simplifying your spa maintenance routine. The long-lasting float system mineral cartridges lasts up to four months or until the hot tub is drained and the bromine cartridges last 2–4 weeks, reducing the need for frequent adjustments. 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. *Compared to the minimum ANSI recommended bromine level of 2.0 ppm for a residential hot tub.