My silver Arowana jumped out of a tiny hole in my tank this morning, luckily I was in the room at the time and was able to get him back in the tank soon after. He started bad once he was back in the tank, but after about 10 minutes he was swimming around minimally. Now he's swimming around fine again, maybe a bit sluggish, but he looks pretty beat up and sometimes sits still with his head angling upward and his tail gradually descending deeper into the tank. What should I do to help him recover and how long should it take him to recover? He's about 5 or 6 inches in a 75 gallon by himself.