It is a calcium / magnesium deficiency?
Hashyanswered grow question 5y ago
I would lean more towards magnesium. Won't hurt it to add a cal mag supplement to your nute line. Other then that she doesn't look too bad.
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geek420answered grow question 5y ago
I think it's the early stage of calcium deficiency. Increase the distance between the light and the seedlings and add calcium as well.
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