the tank has overflows on each side in the center. The guy had it as a salt set up. I was wondering if I should use the over flows or remove them and just run the inlet with a screen cover on the bottom of the tank and then just plumb the outlet so it sticks up some. I ordered an fx5 last night for it. I can only run the filter on one overflow? Or does the fx5 have enough flow to be hooked up to both overflows?