I made the mistake of putting my TSN with my Amphilophus Lyonsi overnight and the next morning my TSN was a little beat up, tail and fins shredded, nothing too bad. I put a divider in immediately. Now my TSN's whiskers are shriveling up, he is not eating, he is swimming sluggishly, and he has a little bit of mucus in certain spots. What should I do? He has gotten skinny from not eating too, so I am really worried.