I have been buying fish from this store for a long time. They are always healthy and I have never once had a disease or parasite issue from them.
I agree that feeding and lights out will help. A safe place to hide is also important. I have done all of that, and the lights are off now. The YTBs have already retreated to their own hidey holes. I may do a bit of rock rearrangement in the morning.. set everyone back on even footing.
I love yellow fish in general! Those baby damsels are so beautiful! I put them in the 32 for now because I think they are too small for the 55 or 180. The 180 (which will likely be their final home, is a FOWLR "predator" tank. These babies would be nothing more than a mouthful for the triggers or the MUCH larger Domino damsels or even the fairly even tempered 3 stripe Damsel in there. Funny thing is, I have read that the 3 stripes are one of the most aggressive of the Damsel family. I have not observed that in my tank, but I have to add that he went into the 180 from the start and there is PLENTY of room for territory in there.