I think my fish has Dropsy..?

My congo tetra has appeared stressed lately and his mouth is gaping rapidly pretty much non stop. He also has turned down all attempts at feeding him, including live brine shrimp :-/. I figured something must have been stressing him, but that it would soon pass over, as there weren't any obvious physical signs of a problem to begin with.

But then comparing him to the other congos around him, and checking the symptoms of Dropsy, things began to stand out. His abdomen is a little swollen, and his eyes are looking even more drugged than is normal for a congo.
I hope he's still in the early stages of Dropsy (if it is dropsy) and that I can help him recover. Looking for advice here guys :help:.

I've set up my 60L as a quarantine tank which is now running, gonna head to the lfs to grab a dropsy treatment
(i'm going on him having dropsy.. Unless anyone here thinks otherwise?).