basicly you can have what ever amount of flow through your sump you want. the limiting factor is the speed of the water flow through the sump. in simple tearms you want the water flow to be low enough that you don't carry over air bubble and such into your display tank.
if you build your sump with a nice space between the baffels and a open area for bubbles to rise then you can get away with more flow.
as for skimmer performance and such, turn over in the sump doesn't matter as the skimmer is still taking the same amount of volume and cleaning it.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
Some strive to be perfect.... I just strive.
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