I'm starting to think that it may be whirling disease. It lays flat perfectly now, but as soon as it starts swimming it does barrel rolls. I am going to treat for internal parasites and infections before I do "the treatment" for whirling disease. I added Melafix, pimafix, and salt to the tank and I will see how it is in the next few days. Should I also add some prazi or something? There are two very small round holes on the center of the back and the head.