I need advice on where to place my newer elegance coral. It’s a perfect cone skeleton so I just sat it into a frag hole that I drilled in a rock. Seems to fit perfectly and be happy. I’ve heard, however, that they should always be kept in the sand bed in order to be happy. Not sure how true this is, but because of the conical shape of the skeleton, it’s been almost impossible to stand it up straight in the sand. If it’s OK on a rock, I’m happy to keep it there, but just don’t wanna kill it. Are they OK to live on a rock?