Tetra Whisper Filter Cartridges 3-Pack， Medium (Internal 2-10 gal / Power Filters 5-15 gal)</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Maintains the performance of Tetra power filters with ultimate convenience</li><li>Coarse floss layers remove large debris， keeping aquarium water clear and clean</li><li>Activated carbon removes discoloration， odor， toxins other aquarium impurities</li><li>Dense， dual-sided mesh catches debris and fish waste， promoting healthy fish</li><li>Includes a 3-pack of medium， ready to use replacement filter cartridges</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/41fKXyCKCiL.jpg' noproxy></br>