FROG Serene® (Bromine) Cartridge - Purple 7.1 oz - 33% More Bromine Compared to Yellow Cartridge Oxidizer Built-in flocculant quickly suspends minerals

Built-in flocculant quickly suspends minerals to clarify spa water for clean results

protecting your pH from sudden swings and making every other step in water care work better

Spa Side Filter has a life expectancy of approximately 1 year if maintained properly

abrasion resistant

FROG Serene® (Bromine) Cartridge - Purple 7.1 oz - 33% More Bromine Compared to Yellow Cartridge Oxidizer Built-in flocculant quickly suspends mineralsThe FROG Serene (Bromine) Cartridge is for use in the Serene In Line System for hot tubs and spas. This purple bromine cartridge contains 33% more bromine than the standard yellow bromine cartridge. Size: 7. 1 oz The Serene (Bromine) cartridge is the active sanitizer in this system. Use in combination with the FROG blue Mineral cartridge, found here. Not sure how to maintain or start up your hot tub on this system? Download the FROG Serene (bromine)