I had a YCG in a 7 gal nano, and still have one in my 42 gal hex. Perches on anything and everything, but usually hangs out with our ocellaris clowns on their adopted pectinia "anemone".
Both fed well on Sally's frozen Marine Cuisine.
Here's the one in the 42 hex with the ocellaris and skunk clowns, who ALL hang out in the same small area in the tank:
