Hey Jay, I think My blue tang has dropsy can you take a look at this link for the other post on the systems and pics pleaseThe rapid breathing is a much more serious symptom than the swelling in the belly. I'm struggling to figure out how they could be related, they may be separate issues, OR whatever is causing the bloating, is also causing a systemic infection that in turn, is causing the fish to breath heavily. At this point, I would say that Maracyn 2 in a treatment tank would be something to try, but I cannot say if it ultimately will be successful...since you need to catch the fish up, you might consider giving it a 5 minute FW dip as you move it. It won't cure any diseases, but IF the fish breathes better the next day, you can then focus on possible gill disease issues.
Jay
I have a blue tang that has acting himself. He lost his appetite and doesn’t swim all over the tank like he was just a few days ago. I started noticing on Saturday that he would just stay attached to a rock and didn’t come for feed anymore.
a about a month or so ago he was swimming downwards...
https://www.reef2reef.com/threads/does-my-blue-tang-have-dropsy.829449/