Still haven't seen him poop (doesn't mean he isn't).
No abnormal swimming at all.
My lfs where I got him from treats there fish with Prazi-pro. So, he was treated with that before I brought him home.
The swelling has gone down a lot (maybe to the point of normal?). Seems more active, less just hanging out. His eating behavior to me is still not quite right. He goes towards food, sometimes takes it, sometimes doesn't. Which, for a new fish, doesn't bother me, but he NEVER takes nori, or other veggie based foods. Odd for a tang I believe.
Currently I am treating the tank with Melafix. A very mild treatment for bacterial infections, etc. Once my 30 gallon tank is available (tomorrow or Saturday), I can move him there and treat him with something stronger. I'm still puzzled as to what I should treat him with though. Last time I treated my tank with Maracyn 2, I killed all my fishies. I'm scared!