Help!!! Emergency

[eevenson]

Hi Everyone. I have had a longnose hawkfish in my tank for 3 days now. I acclimated him nice and slow and he was eating like a pig for 2 days. I did a 5% water change yesterday. After the change all was well. I watched them for a while and a couple hours later i went to bed. Everything was fine. This morning, the hawkfish is laying on the bottom leaning against the glass. Usually he is perched on top of the powerhead. He didn't seem to be "breathing" too heavily.
Ammonia, Nitrates, and Nitrites are 0
SG is 1.023.
All of the other fish in the tank are fine and ate this morning.
Please help, as i do not want to lose this fish.

[Poseidon]

Was he ever in Qt? Do you have a QT tank to move him too?

[leebca]

More times than not this is a signal that the fish is not adapting to captive life. It would be better if the fish was in a hospital tank so that it can 'relax' and get better accustomed to captive life. It is usually a matter of waiting it out.

Keep watching for any symptoms of disease.

[Lance]

Whats the tank size?
Do you have a skimmer and what type powerheads?
What other fish do you have?