I mean, anything outside of the normal range will cause issues…..I’ve never had too acidic water, always too alkaline so that’s where my experience comes from.If it is nitrogen deficiency, it is probally a lockout of some sort. I did hit it, at lights out yesterday, with a light dose of aminos foliar feed. I can't really tell if it did anything.
It may be with an iron def, but the yellowing edges turned up first.
So what pH range causes lockout in both? I assume more towards alkaline.
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Although, there are other things that can cause lockouts….basically anything out of whack will make her unhappy. Without knowing much about your grow style, I can’t speak on it much.