I have a few corals (war coral and two favias) that seem to be turning white. They have been in the tank for about 4-5 weeks and I started to notice them turning white two days ago. There is another favia doing great and it's literally next to one of the ones bleaching. All are located near the bottom of the tank. I did just raise my Alk and Mag about a week ago from 6.9 to 7.8 and 1200 to 1350 respectively as I wanted to get my numbers in order so I could add a CA rx. All other LPS are fine. I know I need to reduce NO3 and PO4. Any ideas?
Parameters:
Ca - 420 - Salifert
dKH - 7.7 - Hanna
Mg - 1350 - Salifert
pH - 8.06 - Hydros
NO3 - 25 - Salifert
PO4 - .261 - Hanna
Salinity - 1.026
Temp - 78-79
Parameters:
Ca - 420 - Salifert
dKH - 7.7 - Hanna
Mg - 1350 - Salifert
pH - 8.06 - Hydros
NO3 - 25 - Salifert
PO4 - .261 - Hanna
Salinity - 1.026
Temp - 78-79