Time for another update.
Unfortunately, my tank has taken a turn for the worse. A couple weeks before christmas I modified my dosing schedule so that the calcium and alkalinity doses were further apart. I had been dosing them within 30 minutes of each other and I was starting to get some overlap in the schedules so both we're being dosed at the same time. I altered the schedule so that it alternated calc and alk each hour. When I did this my alk level jumped from 7.5 to 11 in less than 12 hours.
Normally, this is bad enough, but I also carbon dose my system with vinegar making the swing that much more damaging. I've lost probably 75% of my SPS. The Monti caps are completely gone, most of my acros didn't make it either and those that are still alive don't have much left. My moni digi's have made it through with the exception of the blue German. Birds nests didn't really seem to be affected.
I'm thinking that the alk was precipitating out because it was being dosed so close to the calc and overlapping for part of the dosage. When I changed the schedule I didn't take this into account and drastically overdosed.
Lesson learned...the hard way.
Now, a month later, The SPS that have made it through have very drab colors, but are starting to make a slow comeback. I'm starting to see some new growth on a few pieces that made it through. It's going to take a couple more month to get things looking decent again...at least it wasn't a total loss...