Some corals not so happy??

[Brancho]

Hey wonder if any has any advice? Few of my corals don't seem as happy as they used to be but most are thriving. Attached a couple of pics and wondering of it could be a flow or light issue. They were happy a month ago but take a look at pics let me know?

 

[MoshJosh]

Gonna need a bit of info:

parameters?
Lighting?
Any recent changes?
Any new additions?

 

[Brancho]

Nothing added for a while

Ak 10
MG 1080
Sal 1.026
Ca 420
Ph 8+
Nitrite 0
Ammonia 0
Nitrate 40ppm

Lights on 75% for 8 hours 1 hours sunrise and sunset recently pulled back an hour to see if that would help

 

[Brancho]

Also 125 gallon tank 2 years and 7 fish

 

[Uncle99]

Nothing added for a while

Ak 10
MG 1080
Sal 1.026
Ca 420
Ph 8+
Nitrite 0
Ammonia 0
Nitrate 40ppm

Lights on 75% for 8 hours 1 hours sunrise and sunset recently pulled back an hour to see if that would help

Phosphate?
Feeds the guys that feed our corals.
What that run at?

 

[Brancho]

Pretty shifty ph kit but looks about .3 to .4