Why Turn Off Pumps During Feeding?

[tang daddy]

I turn my vortechs down to 10% for half hr during feed mode and not completely off, the food blows around for 1/2 hr and uneaten food hits the sump to be skimmed out or the crabs find it.

[bignose]

I don't turn my pumps off when I feed my tank which is a sps tank. But if I was feeding a lps tank I would turn the pumps off and target feed each coral, I think it would be a waste of food with the pumps on.