And, as you can see from the first picture, I have already had some zoos to move onto a new rock. I moved the smaller colony up near the stars, but I might have to move them again since the stars are poised to grow right over the zoos.
I'd like to get mine established on my back glass, instead of just coralline algae. I keep having to kalkwasser some of mine to keep them from overtaking one of my acros. Here is a shot with my clam keeping them at bay.
If you look in the background of this pic, you can see them surrounding one of my acros. They have killed it back several times. Its an all out war, but I love the bright green of the star polyps.