hi DragonReef welcome to this forum.
got him for approx. 6 months maybe a bit longer. only problems i had was the loss of all visible tubeworms he can reach. i also now make sure that i always have a couple larger aiptaisa in the system as my copperband does not touch the food i feed, but relies fully of whats in the tank. i got one because i was not able to get rid of my aiptaisa, tried KW paste (which burned one of my LPS), joes juice (expensive), hot water and so on. it seems i was able to kill the aiptaisa but within days new little ones sprouted where mum used to be. :evil:
i now have about 8 nice big ones which the copperband doesn't touch but no visible little ones anymore.
mine does not nip on any other corals at all, but this may be just luck! also my tank has a large population of little critters he shares with a scooter blennie.