Got spots on my WW autos

Grow Cycle
1

Can someone tell me what these spots are and why they’re there?

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2

Kinda looks like to much magnesium but I’m probably wrong.

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Answer these questions and it will help the pros to diagnose the problem.

3

My bad…ffof soil 2 mh 400w each 24" above canopy, humidity 46 dark and 50ish lights on temp is 77 lights on 71 lights of, 4" inline fan and carbon filter, air-condition, spare bedroom not a tent fans not aimed at plant “anymore” just fed Cal mag two tsp- 3 tbls big bloom pH 6.4

4

I don’t have a ppm meter and not sure I could use it if I did lol

5

Seedsman btw

6

In smart pots 5g

7

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8

Cannabis robs Magnesium from the bottom to feed the top. Your newer growth looks healthy so I agree with @MrPeat. Treat with some calmag or Epsom salt.

9

Thank you guys