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There’s a big difference between flow in the display and the turnover with the sump. Be careful you don’t mix the two.
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It seems that the current thinking is 3-5 times through the sump controlled by your return pump, and in-tank "turnover" of around 10 or more controlled by your favorite powerheads.
Back many years ago, I ran 10 times through the sump, as that was the thinking 10+ years
I’m a bit surprised with my own numbers, since I‘m already planning to increase my display flow
Turnover: 2x
Display: 195x
Before anyone asks, no soft coral of course...
Maybe they were soft... after so much flow... they became hard