Here's my new baby. She runs on my drain lines, flowing about 500gph over a 10x5-inch screen. Water flows into the slot pipe from both directions and "piles up" in the middle of the screen a little, but it's better than the water rocketing off of one end IMHO. Powered by two screw-in LED grow lights from China (15 watts each), she seems to be breaking in hard and fast. The bulbs are mounted on a wooden base that is anchored to the block wall behind the sump. I built a simple acrylic box for the lights out of an old football helmet display case. I had to notch the box to get it past a brace in my frag tank stand, though. The screen is rougher than I imagined that a screen could be, and it seems to be paying off.
Two weeks
Three weeks