I came home from a business trip and found one of my commons had torn his upper lip somehow. It is still connected at the corners, so now his lip goes across the middle of his mouth. He was eating, but recently I noticed he dosn't seem to want food...kind of lazy. Should I remove the lip? Or let it hopefully come off by itself. I dont think it will ever heal correctly. his mouth looks like theta how do you think this happened? maybe ran into the side of the tank mouth first?