POLYBIO POLY FILTER PAD 4 X 8"</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Poly Material</li><li>Made in USA and Imported</li><li>Conventional power filter: Place Poly-Filter on bottom plate. Cover with gravel or floss. Do not res</li><li>Plastic undergravel filters: Place Poly-Filter on top of the undergravel plate. Cover filter and pla</li><li>Canister-type power filters: Place Poly-Filter in the chemical filter compartment. Add floss accordi</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/51bPBm9Zh4L.jpg' noproxy></br>