Flippin’ FROG works with its patented minerals and a low dose of chlorine in an easy-to-use, easy-on-the-pocket, dual cartridge system. Best of all, it flips over when the chlorine is empty and needs to be replaced. Great for round pools up to 15′ diameter and oval pools up to 12’x18′. Simply click the mineral and chlorine cartridges together, tether as directed and set in the pool. The mineral cartridge lasts an entire summer^ while the chlorine cartridges last roughly 3-4 weeks. Simply replace the bottom chlorine cartridge when Flippin’ FROG flips over. No touching or pre-measuring chlorine again. Most pool owners haul heavy chlorine buckets to the pool side and dump chlorine into their pool or skimmer on a daily basis. That’s a lot of hassle and those costs add up quickly. Flippin’ FROG operates at only .5 parts per million of chlorine compared to 3-5 parts per million for most pools so you’ll spend less on chlorine and experience soft, silky water all summer.