The heart of the FROG Pool Tender system is fresh minerals that conveniently fit inside the FROG Pool Tender Cycler. Minerals kill bacteria so you can reduce your chlorine use up to 50%* while conditioning the water for softness. With less chlorine*, the water is easier on skin and surfaces – making pool ownership more enjoyable. Plus, FROG minerals have 25% more water polishers for sparking crystal-clear water all summer long. The Mineral Chamber is replaced every 6 months or one pool season, whichever is shorter