My frammer has not been opening up much. The skeletal base appears to have darkened mainly a green algae slime it appears and some purple areas which might be coraline. Near the heads the skeletal area is turning brown it appears. I've had it for over a month and my tank is 5 months old. It is mounted on a rock near the bottom with XR 15 lights. Water parameters have been decent with only some fluctuations in phosphate levels.