Thanks, maybe I should call it "Fenway!"
Three things seem to have helped, although I have to say that coral has taken some surprising abuse.
1) Switched from 250W to 400W (12K) MH
2) Regular feeding with Oyster Feast
3) Switched from Ca Reactor and Kalk Reactor to 2-part.
The efflo is a little scary. I know I'm going to have to frag it, but I'm not sure how to do it without wrecking it.