If it was me, I would hold off feeding for a little while. Make sure it settles and isn’t declining first. Feeding a new arrival is a gamble. I look at it like this.
Feeding a new arrival is a 50/50 gamble that it will help. Some may recover faster. The other half, feeding will cause it to decline faster.
I’ve done both and think not feeding is safer.
NOT feeding a new arrival is 100% that feeding will NOT cause problems. It will not die from no food. They can go months with no food. Waiting a couple weeks to make sure it settles in might be slower, but to me, a living anemone in 3 months is better than no anemone. Feeding is a gamble, not worth it. Nothing good happens fast. But if you think you want to try feeding regardless, spray very small pieces to watch how it reacts.
my 2 yuan