My sump will be 5' x 30" x 20"hammerhead that could be a little to big, if you are going to tee it off to run other equipment.I have a 265g with two 2inch hole in the back of my tank the pump i use is barracuda and that match my water flow going down in the sump. I rather have more water movement in the tank then the system.If you going to run a big pump then your sump should be real big



