Aquatic Arts FilterPlus Bio-Media Aquarium Filter</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Professional grade Bio Media for home aquariums; used in all of our holding tanks at Aquatic Arts</li><li>Completely natural; contains no chemicals or artificial materials; will not alter PH or hardness</li><li>Never needs to be replaced; instant and significant upgrade to almost any aquarium filter</li><li>Enables higher stocking levels and greatly superior Bio Filtration to Bio Balls or Ceramic Rings</li><li>Capable of housing anaerobic bacteria， which can greatly reduce the need for water changes</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/61Oi7wC1mHL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/61WAs%2Bw2vfL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51qC6FAfhAL.jpg' noproxy></br>