Monitor it. If it looks like it has spilled it's guts out, remove it before it can harm the rest of your tank.
If it starts to bleach out (color loss) keep an eye on it to make sure that color comes back, if it looks like it is dying, remove it immediately. color loss results in inappropriate lighting and water chemistry.
Now is the time to research water quality, water chemistry, water flow and lighting a reef tank. If you don't already have reef lighting, you will need it to keep an anemone alive. But, if this one doesn't succeed, remember that it's close to 95% that all wild caught anemones will die in captivity. So, don't beat yourself up over it too bad.
Oh, and hide the supplements from people who don't know chemistry. If you are having problems with your pH, I suggest taking the lid off of your tank and running a refugium on a timer opposite the display tank. Adding pH buffers do NOT fix pH problems long term.
Keep reading... just keep reading, reading, reading... (lol)
https://forums.saltwaterfish.com/t/388776/guides-for-new-hobbyists
