Help with sick coral:

[rs1831]

I'm not sure whats up with this coral but over the last week its been going down hill and today it looks really bad.
Thanks.

 

[happy5446]

I'm not positive, but idea's would be....have you added any new fish? how are the parameters? try spot feeding? have you added new lights or rearranged the tank? just some ideas. Hope it helps.....