Pest damage on my clones?

I have some Godfather OG clones that I think have some sort of pest damage on them. What could it be? This is the best pic I can get

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May be septoria leaf spot.

If it is septoria:

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I see holes…or dots?..

Calcium def maybe ?

They’re brown spots on just the bottom of some of the leaves. I think it’s a calcium deficiency because I forgot about my tap water’s PH being 8.0

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Yeah man 8 is really high.

I’d scope the bottom of the leaves and expect to find nothing and if that’s the case my vote is pH lockout

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Yeah I couldn’t find any eggs/larvae/bugs so it’s definitely Ph. I watered them really good with 6.5 Ph water and some cal-mag (magic fix all lmao)

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