What should be the water cycle in a large reef aquarium? how many tank volumes per hour?

Or you could be me - at 30x šŸ˜œ

I now rely on my return pump for tank flow. There used to be an oceans motions closed loop for that, but I got tired of maintaining it and the over-the-top returns for it. Tank is too small to see ugly powerheads. Considered Gyre pumps, still ugly.

@Bigdelfin As ned said - there are a lot of variables. What size tank and what size sump and what are you putting in the sump?
 
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