CNZ Bulk Bio Balls Filter Media， 25 mm， 4000 Count</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Innovative filter media design maximizes biological filtration</li><li>Achieve a healthier aquarium environment using less bio-filter media</li><li>Great for fresh， saltwater aquarium， fish pond， water fountain filtration systems</li><li>Features plastic construction with high performance stuffing</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/519DkiifGgL.jpg' noproxy></br>