Leave it. They are really hardy and will survive almost anything. I ordered some baby shrooms online a while back. A few of them were so small that they never fully attached and ended up getting "lost" in my tank somewhere. Lo and behold, about six months later I found some of them in completely different places in the tank, attached and happy. I never did find about four of them though :( Too bad, they were really pretty and kind of expensive. But too small for my tank I guess.