guys I need help I am a first time grower and I don't know what causes this. if its a fungus want to get it out. its a og kush auto I feed with r/o water.amd am growing in coco Loco. good light led.. controlled temps. 75 to 82 and 45 to 60 rh. just water and calmag cause coco Loco is amended
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6.5 is high for Coco in my opinion, I usually center at 5.8. And how often do you water/feed? What would help is a little more info, run off pH/ppm, nutrients and frequency, veg or flower. Over watering, wrong ph, potassium deficiency kind of share , need more info to better determine.