My hot tub has built-in mineral and chlorine cartridges. Mineral cartridge lasts about 4 months, chlorine cartridge only lasts about a month. Water turns yellow or cloudy when the chlorine cartridge runs out - with no real advance warning. So I bought this floater - when the water turns color, I toss this floater (with one or two chlorine tablets) into the hot tub, then replace the built-in chlorine cartridge. The water color clears up within a day, then I pull the floater out and dry it for future use.I think this floater would also work fine as the main chlorine source for a hot tub, but, as noted above, I'm not using it that way since my hot tub has built in cartridges.
Rating:
[5 of 5 Stars!]