[ClownNut]

your no3 is too high. color pigments are under the zooxanthellae algae. keep the no3 at lower lvel you should see better results.
your light might be to high. i run my peak from 10-4, led setting custom(10R 255RB 175B)> purple+>C+> AB+B+>AB>custom, none of the setting over 50%. on my rock i have anywhere from 200-350. i start my new piece at the bottom around 120 for 2 weeks, then move them up slowly. some will brown out but regain color within 1 month or 2 after settle into the new spot. time is another thing, it takes time to color up sps.
you run a very blue on t5 side( i do too, 7B+ and 1C+), i setup the LEDs to run on the whiter side to keep the coral getting full spectrum. for me the main thing is the red planet, it has deep red polyp from a friend that run whiter on the t5, within my tank it turn pink/red within 3 weeks, now i setup the led run whiter side, I can see the polyps start to regain the deeper red. only 2 weeks into the new led setting. time will tell, otherwise, i will switch back to 10-14k on t5 side and run the led on the bluer side.