my CB has been with me for couple of years now, i never need to feed it. it's in a well established 2m sps tank. in my experience a CB don't fare well in small tanks. they eat live food and love to forage for critters, some CB will eat aiptasia (but not all do).
i had one in my softie tank for couple of years, but i lost him this Des due to overheating. i had him for 6 years :012:. it's not a hard fish to keep, given that there is enough food in your system.
good luck, i hope he does well