How To Use Progressive Web App aka PWA On 420 Magazine Forum
Note: This feature may not be available in some browsers.
I agree... I see signs of both calcium deficiency up in the top fan leaves but also possibly spider mites in those white specks all over the place.I am just guessing, but have two thoughts...
1) Insect damage. Have you checked out the underside of leaves? You might need to use a magnifying glass or loupe to look really close, as some bugs are tiny-tiny.
2) Calcium deficiency. Are you growing under LEDs? That can create a high demand for CA.
Personally, I think it is bugs, but some other more experienced growers with better diagnostic skills will chime in.
Hope that you get it sorted!