I don't think a QT will help. Michelle, what's your temperature?
I've seen a few issues this year with tanks running a bit too warm, and anemones not doing so well.
If you are having difficulties, bring it in and I'll see if I can nurse it along for a bit. I'm batting 500 with "rehab" anemones recently (have had 2 brought in, one was too far gone, but another is doing much better)...
Jenn