Anemone Ailment?

[kawtoom]

My tank and I are 2-1/2 months into this new hobby (75g. fowlr). Love this forum and have been reading through for a while now. (feel like I know everyone already).
-Question-
I have a Green BTA that has been full and beautiful in my my tank for approx. 3 weeks now. He eats and acted like a healthy Anemone until a week ago. The problem now is that one side of him has begun to shrink, meaning just the tentacles are tiny and dark green and wont plump out... ever (his outer body on that side still works but is shorter). Within the shrunken area and tiny tentacles lies a light pink stringy type goo like shredded chewed bubble gum. He still eats... but slower. The problem side went from 3 tentacles to approx. 15 in the last week, the problem side still closes but the tentacles never change. I've researched online, talked to 3 lfs and I can't get a diagnosis but only three different suggestions on what to do (two of which contradict each other). "Don't feed him and see". "Keep feeding him and see". "He may be dying, stop feeding him and see". I don't want to risk an ammonia spike if it's futile. No the shrimp is not the problem, started before I got him.
Thanks for the help.
(My tank is crystal clear... my camera phone is not, sorry.)

 

[spanko]

At 2.5 months your tank may be too young to hold one of these creatures. However if you can give some more information maybe we can be of some help here. What type of lighting is over the tank? How often are you feeding, normally once a week is sufficient and could even go once every two weeks or so depending on what else is in your tank and how you are feeding. Do you know what natural seawater parameters are and is your tank matching these parameters?