I used to have two, I now have one...one managed to get out and cats got it. I've had it for a couple years now, got it from a sponsor on here. Mine is in a 150 gallon, with a ton of live rock. I'm old school and still follow the fit as much live rock in as you can philosophy. My Golden Dwarf is probably just over a foot long, maybe bigger, but it rarely fully comes out for me to see his full body. He has a yellow tail that is about the same color as a yellow tang, which is really cool. It is in a mixed reef with all sorts of corals and my fish list is
2 x royal gramma
2 occelaris clowns
3 tangs
3 chromis
A few wrasses
Banggai cardinal
He absolutely does not bother any fish. The Grammas are a pair and one of them has stayed tiny for several years and he completely ignores them. He's actually more scared of the fish then they are of him. I feed mine once to twice a week, pieces of fresh gulf shrimp. I give home the food with a pair of very long forceps that I got from an aquarium supply website...I would probably take the food right out of my hand but I wouldn't want to get bit, and he can't see very well. One thing to consider, mine does like to dig out his lair by getting under a rock then shaking back and forth really fast. Make sure your rocks are fully secure before adding it. Though, I may not see his entire body very often, he enjoys watching me most of the day with his head sticking out of his lair most of the day. He is a lot more active at night though, and when he starts getting hungry he will be out in the open more. I would say that he is probably actually one of the best citizens in my community.