whats happening to my Favia

[KevinK]

the favia is located at 12 to 14 inch below the water, 4 inches of from the edge of the reflector (150W HQI)

exept my phosphate (0.07) everything is where it should be (0)
calcium at 430
KH at 8.5 to 9
magnesium at 1350
temp at 25.5 C

no fish that pick's

have a feeling and when locking close, it has som gaps in it, and did not had it before.

my other is still ok, at near the same location, only other side of tank