Looks like a defficiency. But how?

question_a_pig
question_a_pigstarted grow question 16h ago
Hi, I'm puzzled by this plant's behavior. It's being treated in the same way as others. And yet it's stunted and looks unhealthy. Can you please help identify, what's happening? All the info is in the diary. 1st photo is the plant I'm talking about, the other two it's sisters.
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Leaves. Color - Yellow
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John_Kramer
John_Krameranswered grow question 8h ago
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m0use
m0useanswered grow question 10h ago
looks like its getting burnt to me.. the 2nd sister is showing same signs just not as bad. Wonder if your EC/PPM is ok and what the PH is like. The first one is also showing micro issues. making me think PH again.
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Selkot
Selkotanswered grow question 14h ago
hey 👋 It’s time to add some CalMag to your solution, at least 1 ml/L. In my opinion, you’ll see the same symptoms appear on the sisters soon if you don’t start now.
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