Fish is Dying - Help Quick

[rf]

My new Goldrim Tang has been in tank since Sat. and was doing fine until an hour ago when he started floating upside down and breathing quickly. No stimulation including when I pulled him out in a net triggered a response other than a little flip. I put him in QT under limited light to help with stress. All my other fish are acting normal and have been healthy for over 6 months without issue. There are no marks, parasites, rotting than I can see on the fish. So my thought is stress related. Thanks for any help.

 

[LauraCline]

Was the tang in the 12 gallon?

 

[rf]

No, it is a 240gallon.

 

[rf]

Never mind - he is swimming in the blue ocean in the sky. It's probably bigger than my tank anyway. Any tips for the future. The fish had been at the LFS for over a month and appeared very healthy. I confused on this one?

 

[andrewsmart]

what are your paramaters and how did you acclimatise him.

also what are the ph tem and salt levels compared to the lfs.