Hagen Fluval Biological Enhancer for Aquariums</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Immediately establishes safe biological aquarium environment</li><li>Powerful responsive ammonia and nitrite elimination</li><li>Prevents fish loss</li><li>Allows immediate introduction of fish</li><li>For Fresh and Saltwater Use</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/41XK8xVsRBL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31Od7EAUh4L.jpg' noproxy></br>