My original frag was approx 4" long. Over the past 2+ months, I have only been able to get about 2 centimeters of it to attach to a rock. The rest of it refuses all attempts to either be glued, or attach itself. The part which is attached is doing OK, the rest doesn't seem to be too happy. I have it in the seahorse tank with 4-15 watt bulbs, and low water flow. It is about halfway down a 55 gal tank, and the params are in good shape. If anyone wants some, it will be far too easy to clip it with a pair of scissors. It apparently doesn't like these conditions. I have not tried it in my reef tank.