My anemone hermit has "rubbed" his anemone on a rock or something and dislodged it from his shell..............the anemone floated around for a bit then attached itself to the front glass of the tank, it's to high up for the crab to get it back.......should i leave it alone ? i guess its ok on the front glass.......cleaning is going to be a bitch soon.........but i don't want to kill it either