My little firefish Julius has suddenly started swimming as shown in the video and i am extremely concerned if this is either a swim bladder issue or maybe some form of constipation. He didn't eat for a few days and then started eating again recently so I may have fed a little more than needed the last few days, and so i am not ruling constipation fully out of the equation. If it is this, how do i treat it, if not what do you guys think/recommend. Thanks heaps