How the Frog Pool Tender Works: The Frog Pool Tender Fresh Mineral Water pool system utilizes a patented combination of sanitizing minerals along with a low level of chlorine for complete Fresh Mineral Water pool care. All components are introduced into the pool water via the Cycler that is installed after the pump and filter. No daily dosing required, and installation is easy. All FROG Pool Tender Chambers fit inside the Cycler with a precise control dial that meters out the right amount for every pool type and use. Comes with a Lifetime Warranty The Mineral Chamber is inserted first and is designed to destroy bacteria all summer long, while the Chlorine Chamber, precisely dispenses the right level of chlorine for each pool. With the prefilled Mineral Chamber & Chlorine Chamber, there is no more touching or measuring out chemicals, and replacement is a breeze. Simply replace the Chlorine Chamber every 1-3 weeks and the Mineral Chamber every 6 months, set the dial on the cycler to control the water flow, sit back and enjoy your pool.