Fluval 3 Plus Foam Insert， 4-Pack</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Provides biological and mechanical filtration</li><li>Maximizes colonization of beneficial bacteria</li><li>Replacement media for Fluval 3 Underwater Filter</li><li>4-pack</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/514YO-IqroL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/310JUinhDcL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31Ndy3yeBzL.jpg' noproxy></br>