Coral Problems, any thoughts/suggestions?

[asylumdown]

I've never seen carbonate hardness expressed in those units, what does that translate to in dKH or meq/l?

How are you maintaining your water water chemistry? Are you using an auto-doser, or are you dosing by hand? If you dose by hand, how often do you test, and how much do your parameters fluctuate week over week?

IME SPS corals have a very hard time dealing with large swings in carbonate hardness over time, it stresses them out to no end. They can adapt to a pretty wide range of parameters, but not to regular swings in those parameters. I never had any luck with SPS until I got a doser and was able to keep my numbers (especially carbonate hardness) steady over a period of weeks. If your levels are fluctuating and you have high nutrient levels, it might just be too much for SPS.