FROG Serene Replacement Mineral Cartridges for use with Hot Tub FROG Serene Floating Sanitizing System - Prefilled for Quick & Easy Hot Tub Maintenance - 2 Pack

Cartridges for Hot Tub Maintenance: FROG Serene Replacement Mineral Cartridges are designed for use in the FROG Serene Floating System; deliver superior water treatment for a clean and clear hot tub experience. Enhanced Sanitization with Fresh Minerals: Mineral Cartridges sanitize the water along with FROG Serene Bromine. Long-Lasting Cartridge Use: Each FROG Serene Mineral Cartridge lasts 4 months, so you can enjoy long lasting sanitization; once the cartridge is empty, you can recycle it. Support Cleaner Hot Tub Water: Our FROG Serene Mineral Replacement Cartridges create Fresh Mineral Water, making the hot tub easier on skin, swimsuits and your hot tub’s surfaces. 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