Zoa’s Losing Color

[Goofball310]

The Zoa’s in one section of my tank have started turning black. The only thing that’s changed is I cleaned my ORP probe because the readings seemed high (440), and it immediately started reading low (300) after the cleaning. I do run ozone and and lowered my lighting intensity from 30% to 25% in case it was an increase in PAR that is causing this. Anyone have any suggestions on what else I can try to revive them?

Here is a before picture taken on 9/9

Picture taken this morning.

Zoas in a different section of my tank completely unaffected. Tank measures 24x20x12

 

[Tahoe61]

The strats? The images are at different angles.
What fixture are you using?
If not all Zoanthids are affected than it's likely lighting right?

 

[Goofball310]

The strats are the easiest to notice, but it's affected all the zoas in that area except the utter choas.
Fixture: ATI Straton X
I'm assuming it's lighting. I've also started to run carbon since Sunday as a precautionary measure.