I had a lot of luck with mine, lasted a number of years until it was so large it would no longer allow me to keep anything on the left side of my 50 gallon and had to be sold. I didn't do much special, but mine came in already a very aggressive eater. I just made sure to stay up on my water changes and target fed it 1-3 times a week. It would suck back large amounts of food without mucus expulsion. My biggest issue was my cleaner and coral banded getting in there and pulling the food back out of his mouth. They are easy to keep unfortunately in the early 90's they discovered a conditon (the name escapes me ATM) that had infected most of the elegance in the trade. This leaves us with a hit to miss situation, depebding on its age it could be fine! Leaving you with an easy to care for beauty!
Good luck, stunning coral when large!