Hi... I have had 3 6-8 inch reds in the same tank for about a month now... never more than a fin nip but today one of them had a 50 cent piece size taken out of his side. It didn't get to the organs but you can just see the pink of them thru the flesh that is missing. I put him in his own 20 gallon tank and I was wondering if this would heal? Or is he gonna die? Sorry I don't have a digi camara or I would show you guys. Some of his skin is just hanging... What do you think?? Thanks