return pump size?

[Fishward]

Originally Posted by mycat99

i am setting up a 150 gallon tank with a 33 gallon sump .the tank is drilled for 1-1/2 inch overflow with 2 1 inch returns .there is about 4 feet from sump to top of tank .wondeering what size return pump i would need ?do i look at return pump size from head ?also what happen if you get too big of return pump?

If you're worried about getting one too big, then just get a gate or ball valve on your outlet to regulate it. The only problem i can see with getting a pump too big is your flow rate in your returns will get too fast and may erode your plumbing.. also have a higher liklihood for leaks with lots of pressure on your lines.