What size return pump do I need in my sump?

Will

New member
I have a 140 Gallon Tank and a 37 gallon acrylic sump. My overflow box is a single with a 1" PVC returning down to the sump. I had a external 500GPH pump that failed.
So I was wondering instead of running an external pump along with PVC,hoses and leaks, I would put in an internal submersible pump in the sump and use that as my return pump.
I know a lot people do it, but I'm trying to figure out how big of a return pump would I need.
Last thing I want is a wet living room.
 
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