Rust spots on leaves

Kndreyn

Well-Known Member
I'm running 2 gallon hempy buckets under 315 CMH. I usually just run straight perlite, but this time I tried 50/50 Coco/Perlite.

GH Maxibloom 2 T per 5 gallon bucket
1 T Cal-Mag Plus per 5 gallon bucket
1100 PPM solution
1800 PPM runoff
5.9 PH solution
5.6 PH runoff
Feed every other day to runoff

From what I've found it looks like a Calcium deficiency. I'm noticing some downward "clawing" on some leaves also. Any ideas what this might be?
 

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