So a few days ago I came home to my oscar beat up pretty back laying on his side hiding in one of my tank ornaments. Recently him and my other oscar who I believe to be a pair have been battling it out locking lips ect. for a week or so i had noticed they both had done some damage to each other but nothing to serious and I figured this was natural because it is their mating rituals. Well anyway I found him beat up pretty bad and I don't know if it was his mate or one of the other fish. I have another oscar but hes smaller and doesn't normally mess withe the other two. Anyway what it comes down to for a few days i have had him separated in a 10 gallon treating his wounds with melafix. Today I decided that he really shouldnt be in that small of a tank even if im just treating him for a few days and he isnt swimming much so i put him in a 55 with a seperater so that he does not eat my expensive tiger fish if he gets better all of a sudden and decides he needs a snack. Anyway he has been spending most of his time just laying on his side. He has a split fin and that same side of the split fin seems to be pretty beat up as well. Oscars are usually pretty resilient with this kind of stuff from my experience but i would like some advice and reassurance to whether its going to be ok or if i need to take more precautionary action. The woulds look like they are starting to heal but hes doing that thing where he just sits on his side that scares me and im pretty sure hes not in the mood for eating right now.