Hammer coral dark area

[Hogdaddy]

Noticed my hammer coral has a dark spot. Friday it looked full/health in the front right...today, not so much...looks like a few hammers are retracted and dark. Is that normal, or a sign of a bigger problem?
Tested water friday with red sea-
Ph- 8.2
No2, No3, Nh3 all zero
Alk 9.0

Spot fed some mysis friday morning.

 

[BestMomEver]

Weird...

Someone will come along...