Fluval U Underwater Filter BioMax
</br></br>
<div style="text-align:left">
<b>[Product Information]</b><br>
<ul>
<li>Promotes growth of beneficial bacteria</li>
<li>Fits the Fluval U2, U3 and U4 Filters</li>
<li>Replenish only half at one time</li>
<li>Works in freshwater or marine environments</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/51TzE405ngL.jpg'></br>
<img src='http://ecx.images-amazon.com/images/I/31se7rQvbiL.jpg'></br>