CerMedia MarinePure 1.5-Inch Sphere Bio-Filter Media for Marine and Freshwater Aquariums， 2-Quart<div style="text-align: left;"><strong>[Product Information]</strong><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><img src="http://ecx.images-amazon.com/images/I/41%2ByoHYjE2L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31kN1j96OgL.jpg" noproxy>