Red plate montipora bleaching?

[StephenMcn]

Hi sorry it was bedtime in Ireland when you replied. I will be testing today after work and will give in the figures

My numbers are
Kh 6 (jbl) 6.7(salifert) 6.5(red sea)
Ph 8
Ammonia 0
Nitrite less than .05
Nitrate 2
02 10
Phos . 8 (rowaphos added immediately after test)
Sio2 0
Ca 460(jbl) 425(salifert) 400(red sea)
Mag 1360

All tests are done with jbl if not said different