I would be skeptical of your 50 ppm reading from Salifert though - many corals would not be too happy with that level, although I did see you mention some favia issues as of late. I would also expect your Acros to be pretty ticked off at 50 ppm.
See that's the thing, everything in the DT is just fine. Everything is happy, well except me.......
The favia issue is going on in the "grow out." Different tank.
"We shouldn't think of an environment where livestock can survive, we should ensure an environment where livestock can thrive."-Rabidgoose
"If it's gonna be that kinda party, Ima stick my ........ in the mashed potatoes!"-Beastie Boys