Originally Posted by
SantaMonica
Flow is the main problem here. Get a bigger pump first, and put it in the sump.
But actually, I'm not sure I'd pursue a slanted screen at all. You are going to be tinkering and fixing and adjusting things for months, all while you are not getting any filtering. Really, I would just build a scrubber in a fashion that is known to work. And in your case, it would be a 2-sided screen of about 50 square inches, inserted into the water pipe, fed by a larger pump, and with at least a 23W CFL 2700K Floodlight on each side. This will give you the most filtering with the smallest size, and will be working in about a week.