i have the same light... if it's hung 9 inches above water line and the frag is 10 inches below the surface i wouldnt think this is bleaching.
To much flow maybe? I have 2 gyre XF230s. I have been messing with the settings as of now I have it set to pulse mode at 30%.. Changed it from the alternating gyre mode. Anything more and my stuff on the sand bed was getting to much flow. This frag is in direct line with the current.