if anyone is looking for a good hang on back skimmer i think i found one this is 5 days skimming looks pretty dark on my 38 gal nano
<a href="http://s293.beta.photobucket.com/user/ken3516/media/WP_20130111_014_zpsd6191788.jpg.html" target="_blank"><img src="http://i293.photobucket.com/albums/mm78/ken3516/WP_20130111_014_zpsd6191788.jpg" border="0" alt="Photobucket"/></a>
<a href="http://s293.beta.photobucket.com/user/ken3516/media/WP_20130111_015_zps82031726.jpg.html" target="_blank"><img src="http://i293.photobucket.com/albums/mm78/ken3516/WP_20130111_015_zps82031726.jpg" border="0" alt="Photobucket"/></a>
<a href="http://s293.beta.photobucket.com/user/ken3516/media/WP_20130111_014_zpsd6191788.jpg.html" target="_blank"><img src="http://i293.photobucket.com/albums/mm78/ken3516/WP_20130111_014_zpsd6191788.jpg" border="0" alt="Photobucket"/></a>
<a href="http://s293.beta.photobucket.com/user/ken3516/media/WP_20130111_015_zps82031726.jpg.html" target="_blank"><img src="http://i293.photobucket.com/albums/mm78/ken3516/WP_20130111_015_zps82031726.jpg" border="0" alt="Photobucket"/></a>