Cartridge should last between 4-6 weeks. Replacement bromine spa frog cartridge for the Spa Frog sanitising system. This works either in inline feeders or the floating sanitiser system. The cartridge can be turned from 0-6 depending on usage. The bromine cartridge lasts between 4-6 weeks depending on usage. Ensure your PH is between 7.2 and 7.6 to promote bather comfort and sanitiser efficiency.
