Have you checked out the Skimmer from Sapphire Aqautics? It's a guy in Houston that are building them for thee Aquapods and JBJ Nano cubes, but I guess you can use it for any other in sump application.
There is a very informative thread on nano-reef.com.
http://www.nano-reef.com/forums/inde...howtopic=97104
I have mine for 2 days now so it's a bit too early for me to report back any result. So far the skimmate is still pretty wet and has a tea colour. No micro-bubble problems.
anyho.. lemme know if you have questions.