I agree with pm94. I wouldn't turn my filters off for any reason.
When I used to feed flakes, I would first soak them for a couple of minutes in a small bowl of tank water--they sort of swirled around in the tank and the fish had no trouble getting them.
Now I feed Progold pellets and they sink fast--my telescope waits on the bottom (she can't see very well) and the fantail is up at the top--she is so fast that she can zip around and gobble them up as they are sinking.