Brown Spots

[1j9e5t2]

Brown Spots
Greetings,
I have a question about one of my plants.
Currently I am growing 2 plants and this is happening to only one.
This is a Jack Herer in its 4th week of 12/12 flowering.
At first I thought it may be calcium deficiency but, the brown spots are focused on the leaf veins and on older to middle leaves, not new growth. As the spots progress, the leaf curls up and dies.
I’m new at this and welcome some input.
Thanks!

[PLreef]

At first glance I think ph issues , angry roots or possibly bugs. Tell us more about your grow. Watering practices, feeding, light and schedule, substrate and so on. The more info you give the better folks can help.

[Catfish22]

The first pic looks like bugs, the others look like pH issues.

I'm just going off the GWE site, not experience.