<a href="http://s22.beta.photobucket.com/user/Amemaru/media/2013-02-17232159_zps392170be.jpg.html" target="_blank"><img src="http://i22.photobucket.com/albums/b311/Amemaru/2013-02-17232159_zps392170be.jpg" border="0" alt=" photo 2013-02-17232159_zps392170be.jpg"/></a>
Skimmers for small tanks are very easily made. You will need a air flow valve though (not shown in picture).
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