SunSun Canister Filter Aquarium Ceramic Ring</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>4 bags of 1lb ceramic rings in mesh media bag</li><li>Aids in the breakdown and removal of harmful ammonia and nitrite</li><li>Suitable for both freshwater and saltwater filters</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/41hLYRqSuFL.jpg' noproxy></br>