I have had this pearlberry in my tank for about six months. As you can see from the pic it is a dull brown and has looked like this for some time. I have a couple other SPS frags that are doing much better. Clearly it is not dead because there has been a little bit of growth and when only the actinics are on, it has a greenish glow, but I would like to know what could be wrong with it. It sit about 13"-14" below my T5 fixture, and my water parameters are all good. Any ideas?

