As a matter of fact, yes you are lucky. This is a type of coral that will not even open it's feeding tentacles to eat if the flow rate and direction are not matched in the system. You just happened to put him in a spot where you coincidentally matched both. I've heard of aquacultured peices being more adaptive, but I've never seen one. Do not change it's spot or change your water flow setup as it might not like it. CONGRATS on keeping a difficult coral alive.