New Tang not eating and staying in one spot

[reefkeeper369]

By chance was that LFS also using Api?
What is age of tank?

No, they do advanced water tests for $1.50… couple of months

 

[reefkeeper369]

It is sand. The fish looks flawless. Breathing is still a bit elevated. I have an air stone running just in case but I doubt that was the problem as all my other fish are fine and have been for long time. I tested this morning using API and just got back from my LFS with perfect results.
Ammonia 0
Nitrites 0
Nitrates 10
Ph 8.2
I am lowering salinity a tad as we speak

Update: she is swimming around the tank as we speak. Looking great actually. Nibbling on some Nori as well. No appetite for shrimp during normal feeding continues. She seems to be slowly turning around for the better today, that was a big leap. Must be the typical behavior for these fish when first introduced