King Technology 1126112 Pool Frog Replacement Mineral Reservoir Cartridge<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Provides protection against bacteria and algae Helps keep your pool's pH in balance</li><li>Reduces chlorine usage by up to 50-percent</li><li>Fits the Above Ground 6100 Mineral System</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41QNNoTPW5L.jpg" noproxy>