So I have a 29 gallon sumpless aquarium and I have been wanting to add a branching sps coral to it as a centerpiece. I finally got an ATO up and running (I had been doing manual top offs), and now I want to add the coral. The only thing is there is a minor asterina starfish problem in my tank. By minor I mean I can find usually 3 or so starfish on the rocks when I look in my tank each morning. I try to take them out when I see them but I would like to know if it would be acceptable to add the sps coral at this point.