Pearlscale acting off in QT

[iReefer2]

Had a pair of Pearlscales in QT for 2 weeks now with no issues, eating has been fine and they even pecked off some Aiptasia that was starting to grown in there.

Today one of them is acting off.

* No Appetite
* Lethargic
* Color looks subdued.
* Mouth stays open
* Gills look raised and red.

From my diagnosis this appears to be Ammonia poisoning? The 2 Ammonia badges I have reads zero and have done for the entire 2 weeks. Could this be damage from previous handling that's now showing up!

Or something else?

Anything I can do?

Thanks for any advise.

Pics below.

See the mouth open.

See the color compared to the other one. (The other has tail damage but it was like that when I received him and is slowly getting better.)

The gills appear red and raised from behind.

 

[Newsmyrna80]

Have you measured the ammonia with a test kit? IME the ammonia badges are not the most reliable. Do a water change and use Prime or some other ammonia detoxifier to neutralize ammonia.