It is an acan.
They get ticked when moved, hence the looking rough for a few days. It looks normal and happy in the second pic.
They don't like an excessive amount of flow, middle of the tank would be good. Spot feeding will make it happy too.
They can open up 3 times its size when happy and put a heavy sting on anything peaceful. Place it at distance.
Looking good
Ha, just noticed you what you were saying, lol
I've got a few good ones. Saved my Nem & wellso from pretty much scrap. I'll post a new destroying a Nem story in the next day or two. I've put this nem through death ten X's over yesterday trying to get it off a rock with no success, urg!
Not a coral, but I do have a blow-by-blow over on nano-reef of my efforts to save a rock flower anemone after it got itself stuck in the shadows & almost wasted away. Long story short: worked out well, but took a long time.
>http://www.nano-reef.com/uploads/monthly_11_2014/post-70644-0-32484900-1415121208.jpg</a> (this one looks smaller than the "During" shot, but was taken right after it fed, so it's looking like a marshmallow. But has grown significantly & can at this point eat on its own.)
Those acans look great in the "after" pic... really nice & unusual color on them!