how many times a hour should the water go through the sump?

[golf nut]

Originally Posted by danny zubot

my skimmer would work the same down there as it would hanging off the side of my tank, or in my refugium.

That part of your statement is not true it would work better under lower flow circumstances,
it would be more effective hanging on the back of your tank than being in the sump with a 10x turnover rate.