With my 45g corner w 10g sump. I built the sump with a back and forth style baffles along with the verticles, to effectively double it's length and the time for the microbubbes to escape. Return pump was a Mag 350. And I even found I had to throttle that back to keep the microbubbles out of the display.
So I vote for slow, just because of physical sump size
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Dan Pesonen
Umm, a tank or 5
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