Frog's Complete Floating System provides spa and hot tub owners with a way to drastically reduce routine maintenance, while keep your system running at peak efficiency. Complete Floating System combines the power of bromine and minerals in self-contained replaceable cartridges, making the days of carefully measuring out chemicals a thing of the past. Both cartridges ensure your system is free of bacteria, odors, and other harmful contaminants, providing a much more comfortable bathing.