I do not usually turn off all circulation, but I can see why that would be a good idea, especially for some of our corals. The Coral HEaven product from IPSF suggestes turning off everything for 60 minutes!! What I do do is take the opportunity during water changes (when I have to turn off pumps becuase he water level drops below the top of my return pump) to feed corals while the water is circulation-free
Right now I am trying to nurse our orange Carnation coral back to good health (picky eater) so I am taking more time and turning off circulation to get her to eat something!
But in general things just swirl around in there at feeding time.
