We just purchased a Sebae anenome from the LFS with a symbiotic clown fish, and the LFS suggested to allow the anenome to crawl onto a rock that it prefered by placing it where a rock met the sand. We've tried this many times only to have the end result being the anenome flipped upside-down and blown around by the current. How can we get it to stick to a rock. I don't think gluing it to a rock is an option. Any suggestions?