Spa Frog Bromine Cartridge Replacement

This pre-loaded 150g bromine cartridge goes with the Spa Frog Floating Bromine System. Each cartridge lasts approximately 4-5 weeks before needing replacement. It has an adjustable dial at the top to regulate how much bromine gets introduced into the spa. Instead of spooning in bromine daily, you simply replace a pre-filled cartridge about once a month. FROG Serene works by killing bacteria in two ways with sanitizing minerals and a very low level of bromine.