Who is keeping this piece? What kind of light do you have it under?
I have kept it under fairly high light for two years, and it grows like a weed. I knocked it off the rock (stupid epoxy) so it has been down on the sand for a month where it is 26" from my 250 watt halides (20" of water above the coral). As I've been cleaning up my tank the corals have been looking nicer, but this one has changed way more than the others so I'm pretty sure it's the lighting more than anything.
Higher light:
Lower light:
