Green Star Polyps spreading without contact?

[bauder1986]

GSP mainly stays together. But if what the other folks say is true, then keep an eye out for that type of grow in your GSP. Oh yah, GSP will grow over substrate though. But that is easy enough to trim down. Just take a knife, cut the extra junk off, and pop it some where else for a few days to lower its stress levels and then take that piece to another tank or sell it or trade it.