Is my reverse prism favia ok?

[oquockyo]

Hi just need some advice got this favia 3 weeks ago and cant tell if he is doing good or not. All my other corals are fine. Its just this guy was kinda fatter when i got him and now looks a little deflated ?

http://s208.photobucket.com/user/oquockyo/media/image.jpg.html

[sanababit]

It looks fine, they inflate and deflate at will, really nice coral btw

Sana