I was wondering if it really is lighting that causes shell rot or is it like "Carbon causes HITH" when it is really poor water quality that causes these ailments? If it is lighting how much light is too much light?
I'm leaving any real answers to Dr. Roy, but here's my take on it - G. ternatensis often lives in SPS colonies. I think that that species, at least, would do fine provided that there was a good dark burrow for it to hide in.
I'd actually really like to know as well, since we're getting a small (3-4 inch) peacock. Boyfriend plans to make the sandbed deeper and add in a nice PVC tunnel for it, but he's got some nice corals in there as well. I'll probably be called in to adjust the rockwork again...hopefully the peacock will be fine for about 2-3 years in a twenty gallon :/ It's the maximum allowed in the school dorms.