If feed right and cared for they heal at a "super mutant" rate. I'd for sure have a nice amount of salt water salt in the tank. I keep it with mine at all times... More salt when damaged, Less salt when healed.
Even in that condition i still love the fish.. I had one with a bad eye, He was still the best fish i had at that time.
I'm not going to give you the "tank size speach" But if your tank is not atleast six foot long? I'd black both sides out with poster board. I do it to all my ATF tanks. It saves alot of ware on there snout. As you know there super fast and powerfull. Truely a oddity at nature. Best fish in the game period. Congrats!!