Help cal/mag def. or not that is the ?

rocko369

Well-Known Member
Getting brown spots on my upper leaves.
Thinking cal/mag! Any suggestions ? Upper leaves look good but starting to get lots of brown spots on them.
My ph swings 6-7.
Using pro-mix
Roots organics go box
Additives are rock resonator
And a little terpanator at the beginning of flowering.
5 weeks flowering

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