Pool Frog 01125462 In Ground Swimming Replacement Mineral Reservoir Cartridge<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Fits inside the Pool Frog Cycler</li><li>Fits the Following Cyclers: Pool Frog Series 5400 or 5600 and Prevail Series 5790</li><li>Replace Mineral Reservoir every season - do not use more than 6 consecutive months</li><li>Destroys bacteria for improved clarity</li><li>Helps to maintain a neutral pH</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41kVQvcPkVL.jpg" noproxy>