Please help! anemone is starving!

[jcurella]

I bought a long tentacle anemone the size of a grapefruit about a month ago. It is the subspecies with the shorter tentacles but my maroons love it!
But it is not eating, and has shrunk to the size of a tangerine.
It likes to hide under rocks and doesn't eat.
It is showing the symptoms of the starving anemone in this article

http://www.corallore.com/anemone-shrinking/

From what I have read, this is a rare anomaly.
I have 15 years experience in marine tanks, and I am running a really nice system. On top of that, I have not had any other problems with my condies, and soft corals.
I am running a 125 gallon system with A 40 gallon refugium, a 150 gallon rated protein skimmer, A phosphate reactor, and an hob filter with carbon on refugium.
Water parameters seem to be to satisfactory for waste, elements, and salinity.
I have tried isolating the anemone into a tank to eat peacefully without the maroons bothering him. He has only eaten once in the last month, but he regurgitated it.
I have tried shrimp, raw tilapia, and silversides/greenbacks. It will not eat no matter what I do.
Please help! Is there anything I can try that I haven't already?

 

[D-Nak]

It's a physiological fact that anemone don't need to eat. The zooxanthellae that live within their tissue provides the nutrition that an anemone needs to survive. It other words, you don't need to feed it and it should thrive. I suspect another reason is the cause of your nem's "unhappiness". What type of lighting do you have? Can you provide photos of your anemone?