Fluval Bio-Screen - 3-Pack</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Replacement media for the Fluval C4 Power Filter</li><li>Allows area for friendly bacteria to colonize</li><li>Works to block debris and create an easy water flow</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41VxpAmXr9L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/21Md1oaV%2BwL.jpg' noproxy></br>