I used continuum mg liquid.
Up 100ppm/day , till 1.7k from 1.2k.
Make sure u dont wc during high mg. Else mg will drop.
Casualty : none. Nothing dies. sps can still color up. Growth as per normal
All bryopsis died and rocks are back to shiny white in 24days.
Before. 11 nov 2014
After. 5 dec 2014
Now. 10 jan 2015
( coralline algae spread growth super fast. I mean real fast )
My rocks are almost fully covered with coralline now.