I purchased a purple carnation yesterday. I know they are difficult but am willing to give it a try. My concern is there is a small brittle star living in the branches. It is mostly white and has small red rings down the arms. Should I be concerned with this star in my main tank? Also this morning there is another little creature living there which looks like some (very small about 1/4 inch) pistol shrimp. Again should I be concerned putting this in my main tank. Also I haven't dipped this coral, should I? I have some sps, mostly lps, a sun coral which is doing very well, and a crocea clam. My tanks is 1 1/2 years. Thanks for all your help.