S.T. International Activated Carbon and Bacteria Housing for Low-Water Level Filter</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Filled with Powerful Activated-Carbon and Bio-Sponge</li><li>These ready-to-use disposable cartridges remove waste particles， odors and discoloration and are easily changed</li><li>A Powerful Activated Carbon located in the first stage designed to remove color， odor and harmful toxic substances in the water</li><li>A Bio-Filter Sponge (serving as the second stage) cultivates filtering bacteria which eliminates ammonia and builds up the cycling ecosystem</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/41srpvMmcGL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51Mfv%2B%2B-RwL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31BfPcexnVL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31KmhbKInHL.jpg' noproxy></br>