Cyphastrea Issue

[reefer1]

Hi,
I need some help... I have a large colony of bizarro cyphastrea last doesn't look right. The colony grew from a tiny frag. It used to be brightly colored and the polyps would move with water flow.
In the last month, it's kinda a dull blue and the polyps look receded and somewhat flat. It's been in the same location for 6+ months.
Tank parameters are pretty steady (105 gal DT + 20 gal sump, 1.026, 78 degrees, 8.dKH, 420 Ca, 1450Mg, 5ppm NO3, negligible PO4). Lighting is a LED/T5 fixture.
Several sps corals in the same tank have good polyp extension.
The polyps on the RR pink floyd (on the opposite side of the tank) have also receded. (It use to have crazy polyps.)

Any ideas?

Thanks!

 

[mta_morrow]

Have you made any adjustments to your LED’s or replaced any of the t5 bulbs?

 

[reefer1]

I replaced one of my T5 bulbs 3-4 weeks ago. It was 9 months old.
I did measure the PAR in and around the cyphastra yesterday at about 150 (peak)

 

[mta_morrow]

Is it on a rock than can be moved?