I agree with vili_shark. Do not move them around.
I keep mine in a bowls all the time and lift the bowls out to feed. I grow my own phyto and that is all that I feed. About a tablespoon turns the water green, and it is clear in 20 minutes or so.
I personally like this method better than target. However, if you target feed right, it is plenty effective.
3-4 times a week should be enough.