Hey everyone. Here's a pic of a couple leaves on the same plant. In real life the blotches are much darker, almost black. Can't imagine being a deficiency, last time i fertilized was 7-7 with 1/2 strength Advanced Nutrients.
last watering was 7-9 ph=6.5
plants are Clones, in fox farm happy frog and perilite. little over 3 weeks old.
Nutes are Advanced Grow, micro, bloom with, superthrive, silica blast, voodoo juice and b-52.
Temps 70-80
Humidity 30-50
using 450 watt MH
Plant otherwise looks healthy. damage seems to be on older Fan leaves. thanks a lot for any help.