FROG Serene Mineral Cartridge

The FROG Serene Mineral Cartridge is used with the FROG Serene Bromine Cartridge to kill bacteria 2 ways and maintains cleaner, clearer, softer water that’s easier to care for. Simply replace the mineral cartridge once every 4 months, and the bromine cartridge once every 2-4 weeks. The FROG Serene System uses up to 50%* less bromine than standard bromine spas.