King Technology 01-14-3883 Floating System, King Technology Spa FrogKing Technology Spa Frog Floating Mineral Sanitizer Spa Frog Mineral Sanitizers are the only mineral systems for spas that work with low levels of bromine or chlorine for the highest water quality. The Spa Frog Floating System uses pre-filled mineral and bromine cartridges that snap into a reusable floating holder and works in any spa. The Spa Frog Floating System transforms your spa into the perfect environment for soothing relaxation with up to 50% less bromine than standard bromine spas. Cartridges are easily adjusted to meet the sanitizing needs of virtually any size spa. Replace the mineral cartridge every four months when you drain and refill your spa. The bromine cartridge will last two to four weeks depending on use.