I have a rock with YSPs and Button Polyps. The problem was that the Buttons seemed to have taken over. The YSPs were not growing. So I decided to interrupt Sunday Football with a little Fragging. I pretty much peeled ALL the YSPs off the rock and relocated them onto three different rocks. This is what they look like: Before - This picture was from June. The YSPs were down to about a third of this quantity today. The Frags today. In this pic the YSPs are the bottom purple mat. The top purple is Coraline. The third rack only has 3 small reminants and I did not take a picture.