Hello all, I was about to feed my plants when I noticed two small dark spots on one leaf. Please help diagnose this so I can feed and feed properly. I gave them .6ml per gallon flora nova bloom a cpl days ago. I also gave them 1.2ml calmag per gallon the same day. Do I need calmag with tap water? Is this fro the floranova? Shall I feed with distilled water this time? First Grow! Hempy Bucket/Coco Coir/Lemon OG/From Seed!!/Led Grow!! Thank you for your time.