Need help with these spots in leaves. Septoria?

harakka

Member
90E85C21-6564-433B-AD87-C825F6D00301.jpegAny idea what could be happening? It’s a autoflower critical purple. PH on runoff is 6.3, and every watering has been with distilled water and cal-mag. It is 3.5 week old at this point. Thank you.
 
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