So I got a frag pack a few days ago and I noticed that one looked dead not in to good of shape. I set it up in a spot and notice it was being moved. I also notice that some pods were gone. I set it up today where I could see it and saw the yellow tang picking at them. Is this normal? It was only the yellow tang doing it, I also have a brown tang. I was thinking he was picking because they might have been dead. The other frags looked fine.