Always liked the look of gsp, but from the very beginning I have been told they are evil. I just never bothered with them because of that. I am thinking about getting some. Now I figure there is one of two ways I can go. Either just have a gsp tank, or some sort of bio control. I don't really just want to make an island for them. The real question has anyone had any coral that could keep them in place? I've been told some might, but never a certain answer.