Fluval A372 Fine Vacuum Bag for Gravel Cleaner Kit (2 Pack)</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Compatible with the Fluval FX Gravel Vacuum (Item #A370 - sold separately)</li><li>Provides a deep clean， reducing water change frequency</li><li>Recommended replacement after 2 uses</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/51Z7u%2B%2BaBTL.jpg' noproxy></br>