I have the same birdsnest. Take a look in my tank journal for growth on it. It grows really well, its a fantastic piece.
**edit**
This is why I don't type and chat about corals at the same time....I ment digitata.
Here is the correct url:
http://canreef.com/vbulletin/showthr...t=32184&page=2 middle of the page is the purple digi.