Aquaclear Activated Carbon Insert， 30-Gallon Aquariums， 3-Pack (6-pack)</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Convenient 18 pack. (6) 3pks</li><li>Adsorbs odors， discoloration and impurities</li><li>Designed to fit the AquaClear 30 filter</li><li>Suitable for aquariums between 10 to 30 gallons</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/61fBBDX1KGL.jpg' noproxy></br>