Thank you for the information. Unfortunately I thought the corals I have already were all soft corals....it sounds like I am wrong though. I already have hammers, frogspawn, mushrooms, leathers, yellow polyps, halomitra dome, star polyps, pink zoos, zenia and sponges. The tank looks very healthy and everything opens up so gorgeous. I hope I don't have a problem hovering in there I wasn't aware of. I am worried now!! Please advise me if one or more of these is particularly a problem to fix right away. I guess I better not be adding any montipora to this tank.