I built this tonight in about thirty minutes. It is a DIY nano protein skimmer that is designed to fit
under the hood of an AquaPod 12 gallon all in one reef tank. The parts are a Fluval gravel cleaner, an air-pump, air-stone and some tubing.
One airline runs the air-stone at the bottom of the large tube and the other airline at the top is where the muck will run off. I just built it tonight so it will likely need a couple of days to see if it catches any goo.
Total price is less that $30 bucks so if it doesn't work it is no big loss.
At the bottom of this post is a video showing the skimmer mounted and bubbling away.
http://youtu.be/Dq1oTE_VvWg