*Hello all, thank you in advance. This is my first grow and i'm getting speckled brown spots on my fan leaves and they eventually turn yellow. see some red veins too. I've got two plants (bubble kush and blue cheese) in closet in FF ocean in 5 gal buckets with drainage (both plants affected). Both plants otherwise appear to be growing healthily.
Wasn't feeding too much (light FF Grow Big during veg) when it started because they were growing too fast and thought FF had adequate nutes, so don't think its nute burn (but could be wrong i guess).
Right now they're 20 days into bloom.
I water about every 5 days.
Temps been in low 80s, 50% humidity.
Havent checked ph in awhile because my ph tester doesnt seem to be working (new one coming any day now) but earlier in grow was around 5.5 with all same conditions.
Under 2 led 90w ufos (so its not heat).
1st thought mites, but never seen anything living (with microscope, magnify glass) and think would see webs by now, been going on for weeks.
Next thought magnesium deficiency cause of red veins, gave good strong feeding of FF tiger bloom 5 days ago (has mag) but problem still getting worse. May try epsom salts next?
I've been looking at different pictures/videos and reading everything i can find but I'm getting to the point everything i read seems to fit my problems and i don't want to start trying everything all at once to fix it.
Any advice for a lost amateur? (also this is my first post, if i'm doing anything stupid please let me know, thanks)