CerMedia MarinePure 1.5-Inch Sphere Bio-Filter Media for Marine and Freshwater Aquariums， 1-Gallon</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Ceramic Bio-filter Media with Vast Surface Area AND Open-Flow Porosity</li><li>Ammonia and Nitrite Removal</li><li>Nitrate Reduction</li><li>Inert Ceramic</li><li>For SaltWater and FreshWater Aquariums</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/41rEFrUAvCL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/61oG9UZpjkL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/516oFCOtnBL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51mZxXdOrKL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41E-GWuVF4L.jpg' noproxy></br>