So it's been a while since an update, mainly because there was nothing to report. The anemone attached itself to a rock in the back corner of the tank and refused to come out. A couple times I was able to give it good, but mostly everything I attempted to give it was just blown away by the current.
Last week I noticed it had started moving around again and was looking particularly bad. I got married on Sunday and was out of town from Friday to today. When I came home today I found the nem detached and upside down beneath all of the rocks.
After some difficulty I was able to retrieve it but unfortunately it was clear it was gone. Many small pieces broke off when I pulled it out, and it had begun to smell. Thankfully the smell wasn't overwhelmingly horrible, so I don't think it has been decaying for too long.
Despite the expected, though still unfortunate outcome, I just wanted to say thank you to all of the people who helped me out and gave me advice during these past several months!