Gorgonian help please.

[K SEE]

Wondering if anybody can tell me how I might save a gorg I am having issues with. I bought it on a piece of Florida LR and it looked great for about a month. It's been deteriorating and lacking PE for about three weeks now. I'm not sure if it is NPS or not but I broadcast feed a reef food twice a week so it should be able to feed if needed. Parameters are stable and nutrients are in check. I have one other gorg that is thriving in this system. I'll include pics of both below. Thanks in advance.

The dying one.

The thriving one.

Macro shot of polyps before it started receding.

 

[cloak]

http://www.advancedaquarist.com/2004/3/inverts

HTH.