Ok, I got my cpr overflow rated at 1500gph(I wanted overkill) but I wanted to know what size of a pump to run from my 55gal sump/refugium to the 100gal display? I plan on 3 powerheads in addition to the return. There is 4' from surface to surface of the tanks, and I know you want 10 to 20 times the volume in flow, so how.much should be from my pump and how much from my power heads? Any ideas or input is welcomed!!!!!