I've got a bubble tip anemone that's been in my tank for about 3 weeks now. It's had a hard time finding a home, and recently I found that it's foot looked black. Upon further investigation, it looks like it's attached to a hermit crab shell. Is this normal? Is there anything I can do to change the situation? The anemones healthy, eats every other week. I just don't know how to get to attached to a rock. Any advice you can give would be greatly appreciated.