Thanks reefergirl & D12. I seem to have hit or miss luck with zoanthids.
I have purchased some really nice colonies before only to have them wither away within a week or two, while other colonies I purchased at the same time from the same tank in the same LFS seem to grow pretty fast. I'm not sure what causes that to happen.
The lime green ones I received in a trade from avbryce1 a little while back and they seem to be growing pretty good. I'm very pleased with them. The photo does not do them justice. Gotta get a better camera