Thanx guys the center rock is Tonga which has an awesome "keyhole" shape at the end of it, and the others my LFS told me was just regular LR and the one rock in back is deepwater LR. My dottyback has been swimming through every little nook and cranny he can! Lol love watching him. It seems I am going through a little diatom outbreak right now, and the pics are crappy cuz they were taken with my phone. Will load better pics that I took with my actual camera soon.