When I saw the one you are building on Reef central I made one. It does work well....but the one problem I found is on the down draft side , after a few months the substrate will compact and you will get a reduced flow. There was enuf reduction for an air bubble to form and I could see the water just dripping through.
So I built a new one with these plans, also from reef central
http://www.reefcentral.com/forums/sh...hreadid=587186 It works well
