FWIW, Julian Sprung wrote an article a while back on the poor survivability of elegance corals over the last few years (they had been very hardy supposedly before that). He theorized that some sort of bacterial infection was occuring in them. He also mentioned that treating the coral with antibiotics for 2 days could cure the condition. Though I have not tried with an elegance, I recently was having a problem with an open brain Lobophyllia (my fault for putting it in poor conditions for a few days several weeks earlier), I used a bath of neomycin for two days and the coral clearly turned around. This was the first time I'd ever tried such a treatment.