Hi starcollector. Sorry to hear about your fish. From what I've heard about Petsmart (we don't have them over here) they are not a good place to be getting fish from in the first place, as fish are often unhealthy or dying.
From the description you have given, I would say that there is little chance for the sick gourami and it would be more humane to put him out of his misery.
Do you have the gouramis in a quarantine tank?
From the description you have given, I would say that there is little chance for the sick gourami and it would be more humane to put him out of his misery.
Do you have the gouramis in a quarantine tank?