I added a couple different types of Star polyps to my reef a few months back. Now, I see both of them starting to spread out a bit. Which is OK for now, but I forsee a time coming soon when I may want to limit their quest for world domination. When they expand, they seem to do so by extruding a sort of thick pinkish "foundation" material first, then shortly thereafter you have new polyps growing out of that. So, how do you cut this stuff back? Do you cut across the "foundation material" and pull off the excess?