Hmmm interesting. So you have a horizontal screen, secured into the pipe (or over the top of it) and water pumped in from below? Lit from above? I would say give it a try. That's an idea I have not seen before, and might I say a very good one
i will be moving to a new apartment in two weeks. i plan on starting this project after that. if this works it would be great for sumpless tanks. i would be able to use the light from the display tank. also a light could be used underneath the tank. so it can be two sided.