K, well I went and bought some 1/4" plexiglass and cut it 7 inches high and then drilled some holes in it. I placed it lengthwise across the front of the sump and its about 5 inches wide. I tried to put most of the sand in it. The pump is pretty much free of sand and I put a sponge filter right on the intake. I need to drill more holes I think, but this should hopefully work?