I have had this Tomini tang for almost a month. I got it from a local fish store that had it for around 2 weeks before I bought it. It was in QT for the first 3 weeks going through preventative treatment with copper and some other medications for parasites. I moved the fish to my display 7 days ago, and it has been eating everything I feed the tank except nori. However, it will eat algae pellets off the sand and frequently picks at the rocks, glass, and sand when it is not hiding in its cave. The fish has never shown any signs of disease and looked perfectly normal up until around 3 days ago when it started showing a bloated belly. I would say the belly has gotten larger over the last 3 days and seems abnormal. The fish doesn't seem to be struggling to swim and is acting normal. Is this something to be concerned about? Or is the tang finally comfortable and starting to fatten up?