I've have just recently purchased my second arowana after my first one passed away. My jack Dempsey never had issues with arowana, until I got my new one. I put him in and everything seemed fine I went to bed and the next morning went to check on my new fish. Upon walking up to my tank my arowana was barley breathing, severely beatin, shredded fins, tail chewed etc. I put him in hospital tank but he's just floating there straight up and down. His back seems broken because he tried to swim but cannot move the rest half of his bodie beside his head. Everything else looks numb. Is this fish doomed or can I do anything to save him??