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From a powerheadAre referring to actual tank turn over through overflows to a sump and returning to tank from return pump or water currents from wavemakers?
I love this reply lolWhen all your stuff is falling off your rocks, or you're creating a sandstorm in your tank, or your fish look like they are working for their life to swim around then your flow is too much...
blow your rocks with a baster, and follow the biggest piece of anything you see that is suspended and just watch it... if you see it flow around your tank like a beautiful plastic bag from that movie American Beauty, then you're all gravy bro
He pretty much covered it.... but I do know that there are certain corals that like more or less flow than the others, just as there are some that like more or less light.From a powerhead

