how can you tell if acros are happy?

[pomme]

how can you tell if acros are happy?

hiya yah i am thinking of putting some acros into my tank but i have been wondering how you can tell if they are okay in there, as its easy with soft corals as they shrivel up or the polyps go away, but is this the same with acros?

if so could someone please show me a picture of this, and are all acros the same in this way?

thanx andrew

 

[ste2k3]

they should have there polyps out fully most of the time and there should be no loss of tissue. i will post some pics of mine when I get time.