AA Aquarium AA03W-UVC Green Killing Machine Spare Bulb， 3W</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Keep your aquarium crystal clear</li><li>Controls green water， eliminates cloudiness & bacteria without any chemicals</li><li>Perfect for aquariums up to 20 Ga (80L)</li><li>No installation at all， simply clip to any waterfall filter</li><li>Led signals need for a UV bulb replacement</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/412j2aatqQL.jpg' noproxy></br>