Sailfi tang help

[Shluffer]

Probably not my best move, but was frustrated:
3 small tangs and a wrass in QT, 50g breeder, had amonia problems. Thaught it was cycled, but maybe not. (Leaving out some water changes)

1) methylyn blue dip
2) treated with prazi on day 3
3) lost a tang on day 6. Amonia was at .5 ppm. Large water change, added filtration and aeration
4) day 7 amonia was fine. 20% water change. Sailfin tang started hiding
5) day 9, time for second prazi. Was worried o2 level in water was too low, so gave a bath in prazi instead, then methyl, Acclimated and out in main tank (yes, not my best move)

Wrass went immediately for the sand. Not worried. Chocklate and sailfin tang spent an hour swimming around the tank. Chased my clowns. Thaught all was good.

This morning, sailfin is in top right corner of tank breathing hard. Wont move from the corner. Chocolate tang is swimming around, but keeps visiting his friend.

Anything I can do? Or is this a wait and see?

 

[Shluffer]

Small possibly unimportant update. My cleaner wrass is cleaning both tangs. I assume that's just a thing, but it could be a good thing?

 

[Shluffer]

Adding a picture. He runs when I get close with the camera. He was swimming downward when I took the photo. He looks thin, but otherwise healthy (other than the labored breathing).