I've had my alligator gar since he was a baby, inside a 20gal tank. And of course he grew much faster than I expected and I've been in a rush for a tank. So he was about 11/12in long sitting in a 20 gal and he would bang up his nose. Now he's inside my 4x2x2 120 and grew up a bit to 13in but theirs still some discoloration and it still doesn't look healed, is their anything I can do to help him out?

