Spa Frog

The Spa Frog System is built into many American made hot tubs. It comprises pre-filled mineral and bromine cartridges that slot into a compartment accessed from the top of the tub.
The Spa Frog mineral cartridge enables hot tubs sanitised with Spa Frog to use 50% - 80% less bromine than hot tubs treated with bromine alone; so there is less chemical use, less chance of skin irritation and less potential for a 'chemical smell'.