I don't feed the damsels but 2 times a day and I try to keep the dose to a min.
You can feed those damsels every other day. Two times a day, even at the minimum, is a bit much. Especially if you are feeding flakes.
I had the same problem, when I upgraded my lights. I bumped them from 10 hours down to 8 hours.
I would try feeding less, and run your lights less.