The Spa Frog Floating System from King Technology incorporates minerals to help reduce the need of bromine in your spa while also fighting algae and bacteria's.
Features: Floats in your spa, has a mineral and bromine cartridge, reduces the use of bromine up to 50%, helps prevent and eliminate algae and bacteria's, and bromine cartridges should be replaced every 4 weeks, and mineral cartridge every 4 months.