Flippin’ FROG XL works with its patented minerals and a low dose of chlorine in an easy-to-use, easy-on-the-pocket, dual cartridge system to give you Fresh Mineral Water for all pools up to 10,000 gallons. Best of all, it flips over when the orange chlorine cartridge is empty and needs to be replaced. Simply click the mineral and chlorine cartridges together, tether as directed and set in the pool. The green mineral cartridge lasts an entire summer (up to 6 months) while the orange chlorine cartridges last roughly 3-4 weeks. Simply replace the bottom orange chlorine cartridge when Flippin’ FROG XL flips over. No touching or pre-measuring of chlorine is necessary. 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 XL 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.