I need to agree with all you guys, but i already made a experiment and nothing spilled on the leafs… its is something what the plant develop or some insect passed there and leave it.
Tthat pattern already appear in a few of my plants, and its ever centralized… never in the entire plant… just on 1 or 2 leafs, and closest one by other… but i already spilled water, h2o2, alcool and put on one leaf on light to see what happens and nothing made something like this.
Like i said, my major suspect is about some dicease on root… its always come with something on roots. And now with the scrog, access the root chamber is harder i cant get a good look on the roots to see if anything is happening there.