hummm, not good in a new tank ?? Its 2 months old, just that long piece of LR is new. Its got some good coral line growing on the other side, but i flipped it over, to make a secure place to put the coral. I heard that colt coral was one of the easiest corals to keep for a beginner. Is that wrong ?? yes my husband and i are both new to this, so feel free to comment, just dont bite my head off okies.. LOL