Hi I’m a little confused on what size tubing for plumbing I should be using on my new tank I’m setting up. It’s a 145g with a return that can push from 2000 - 3000 gph. I need suggestions on the size of the hole that should be drilled for the return. My overflow has holes that are , I believe 3 inches. Also what size should the pvc be to plumb it. Thanks!