On my 135 mixed reef (72x24x20) I have one Tunze 6000 on a single controller (1850 gph) plus an Eheim 1260 return split three ways (one looped back into the sump (~400 gph back into the tank).

That's not all that much but I have less live rock than most others have in tanks of this size and the rock is arranged to allow for Gyre-type flow - think of a racetrack with the water circling around the track and the rocks in the middle infield. So I've been able to get away with less gph and powerheads.

flow
 

tank size 56 gal 36x18x20.
mag 12 return.
mag 18 closed loop on a scwd
total flow around 2360.

33 Gallon LPS and SEIO 620 (or maybe 820).

YEAH BABY

2 x Koralia 3's in my 55G. Oh, and the awesome flow from both the Phosban Reactor and the Skimmer.

How 'bout them apples?

Water flow
 

My 125 gal. SPS dominated tank has 2 x Tunze 6100 w/ single-controller, Tunze wavebox and 2 x Koralia 4. I also have SEDRA 9000 for my return.

on my current 40 I've got a korilla 3 and a korilla 1. The skimmer adds some flow, but not a lot, maybe 225gph, at least that's what the pump is rated for.

On my new 70 that I've ordered, I am planning on running 500gph on the return line from the sump and moving the korilla 3 and korilla 1 over to the new tank. I'll probably dump the 1 and replace it with another 3 or maybe step up to a 4. It's a lot of softies and LPS with a single SPS.

oops, I forgot to answer the whole question...for the first one I would love more flow, but none on the second one.