I'm looking for a hardy soft coral too populate the bottom of my bare bottom tank with live rock and palys and zoas. Right now I'm thinking of mushrooms, zoas/palys, and green star polyps, but I'm interested in hearing everyone's suggestions. What is everyone's thoughts on my choices? I also want a coral that spreads fast but won't smother the zoas growing on my rocks. Is it possible to keep GSP growing getting on the rock work? Thanks in advance.