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fan leaves with brown spots and cristpy: Autoflower WW in week 4

Mappo
Mappostarted grow question 3 years ago
My CKS WW autos started developing brown spots on the fan leaves about a week ago and they eventually turn crispy and curl. I'm growing in DWC w/ GH Flora Trio+CalMag+Hydroguard. pH 5.8-6.0, EC 1500, res temp 70 (was as high as 74).
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Leaves. Other
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Fruitgrower
Fruitgroweranswered grow question 3 years ago
Ec is massively too high for this stage, probably causing lockout and over feeding issuses. Light could be too close, plant looks very short and squat and crispy leaves. The newer growth looks good though
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Mappo
Mappoanswered grow question 3 years ago
Thanks Fruitgrower. I was following the nutrient schedule by Nebula Haze/growweedeasy,and based on what I've read I thought 1500 microseimens / 750 ppm was within the acceptable range for a plant transitioning to flower (first pistils showed up yesterday on one plant). The nutrients were at 660 ppm / 1320 ms, but added a bit more calmag yesterday because I thought it might be deficient. If this is due to nutrient burn, then I probably just made it worse LOL.
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