I've got something. I.m not sure if it's a deficiency or disease. I'm in week 5 of an 11-12 week of a Sour Crack autoflower plant. I'm feeding at 800ppm with silica, Technaflora Boost, Grow and Cal Mag. pH pretty stable 5.3 to 6.2 adjusting every 36-48 hours. I have it on one leaf bad and a few other random spots up and down the plant. Any thoughts?
I've been spraying the rockwool and hydron with SM-90 to kill any larva.