Whats wrong with my Colt?

I have had it for over a month now, but in the past week it has turned a terrible color and doesnt seem to be opening as much. It is in a 30 gal...water params are.
pH: 8.2
Sal: 1.026
trates, trites and amm: 0
dkH: 9.3
Cal: 420-440
Temp: 80-81 steady
Lighting is 2x65w PC one 10,000k one acintic
Other corals are: 2 green shrooms, Zoo colony, Frogspawn, and a new rock of Blastos, all of which are growing VERY fast as is my Coraline. Any help would be great.
 
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