Where do you have it in your tank? Mine is on a large rock about 4-5" off the bottom and just off to the left of the lamp. This puts it probably 24" beneath and 6" left of a 250W Radium. Polyp extension is phenomenal, color is good, and it's grown to attach itself to some of the surrounding rocks. With the polyps fully extended you can barely see the green encrusting skeleton.
Mike