I thought the pump was putting out 1100gph, but it turns out to be more than that. The pump sits basically on the ground and runs up, I would guess about 6.5feet (at work so I have to guess) Then splits into a SCWD. So I should be at around 1000gph. I will take the filter out tomorrow when I get home and crank the pump back up and see what happens. If it is filling with foam, whats the solution there?