Dark Spots on Fan Leaves

jpMI

New Member
Hey everyone, novice grower here and new to this site.
I was hoping i could get a little help with my plants issue. I am using an organic bagged soil, just add water, and the fan leaves keep getting dark spots. They seem to progress to rust colored spots. Otherwise it looks pretty healthy to me. Went to the grow shop and the guy said my ph was off because the tap water in town is 7 and he also told me not to flush. He claims he grows with our water, hydro i believe, just gotta ph it. Got my ph corrected and she took off started doing good and now the problem is back.
Island Sweet Skunk 51 days from seed, m3 michigan made soil mix, 4” inline fan carbon filter both sides, 2x2x3 tent scrog, mars hydro ts600, and tap water run through a pur filter and then ph’d to 6.0 with ph down. I will attach a couple photos i got before lights off tonight. Any help would be greatly appreciated and i can provide anymore info ya might need.
Thanks a ton in advance for any help! I have tried researching and can’t quite pinpoint it so i figured i’d ask some more opinions.
 

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smokinrav

Well-Known Member
Generally, rust-colored spots on marijuana leaves indicate a fungal infection or a deficiency in magnesium or calcium. Nutrient burn is also a possible culprit.
 
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