Nice pick on the Goniopora! Mine is doing extremely well. The longest tentacles are probably 5 inches. When it is opened all the way it is probably about the size of one of those small soccer balls. It is huge! I have heard that they do not typically survive more than a year in captivity. Check out goniopora.org they have a lot of information on how to keep them. I recently just purchased some phyto-feast, tigger pods, and arcti pods to feed mine.
I originally got everything to feed my potters wrasse, but he is no longer with us (I wrote about it on my thread if you care to know what happened). I am currently culturing the tigger-pods which are a large red copepod. Whenever I get a nice culture going I will throw you a bottle if you are interested in seeding your refugium or want to start up a culture of your own. I have heard of a lot of success stories from people who keep a side culture going and feed their tank so they can keep a mandarin. Let me know if you are interested.
Nice new frags by the way, looking good as always!