Leaf problems on 40 days flower

[E9noxis]

I posted these in my flip thread. I posted them here for some attention

Whats going on with the BlueWidow leaves? She didn't defoliate them like I did to mine. The buds are progressing nice but her leaves look like this pretty much over the whole plant

 

[Backyard_Boogie]

The only thing that comes to mind is CalMag deficiency. Are you using an LED? This is indoor correct? Whatever it is looks to be in the beginning stages. Im willing to bet CalMag deficiency it happens all the time especially with LEDs and it starts out small then turns into rust spots on the leafs like below...

 

[JohnnyApp]

Ph of the runoff?

 

[E9noxis]

We added extra calmag to that one. The other plants aren't showing those signs. The northern has a bit of light coloring on the edges of the leaves. I only noticed searching out vein signs.

I've never ph tested. I just tried out my meter and it has a dead battery. @VIVOSUN

I'll get a new battery and calibrate it and learn it so I can test on the next feed.