Fluval Biological Cleaner for Aquariums， 8.4-Ounce</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Reduces aquarium maintenance by cleaning gravel， power filters， decorations and interior surfaces</li><li>Rapidly reduces organic waste</li><li>Digests waste in filters， gravel and aquarium surfaces</li><li>Very beneficial for goldfish， cichlid and heavily populated aquariums</li><li>Use with Fluval Biological Enhancer for optimal protection against ammonia and nitrate</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/41IYlYVxaKL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51BFlskPXcL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31slN4imHyL.jpg' noproxy></br>