SPA FROG Serene Mineral Cartridge King Technology 01_14_3812 Replacement with Bonus Frog Maintain Non_Chlorine Shock 1_Pack

This Spa Frog Mineral Cartridge refill is for use in either the Spa Frog Floating System, or for users of the Spa Frog Inline System which is factory-installed in the spa. For use with companion Frog Bromine Cartridge.  Nobody likes chlorine! Using minerals to treat your Hot Tub means you use way less chlorine. The result is Fresh Mineral Water: cleaner, clearer, softer, easier to maintain.  FROG Serene keeps your hot tub clean while eliminating the work and the guesswork. FROG Serene works by treating bacteria in two ways with minerals and a very low level of bromine. The resulting Fresh Mineral Water has a completely different quality that provides the serene feeling you’re looking for.  The mineral cartridges last up to four full months, while the bromine (sold separately) can be dialed in to meet your precise needs, usually about three weeks per cartridge. Just snap the two cartridges into the floating cap and relax!