I used to have that leaf damage happen when I'd feed too high. I haven't updated to this point but I have an auto in week 4. It's right at the same stage as yours. It's lush green all the way through and my TDS is only 150. That simple little change in reduction has made hella difference in these three current grows! Just my two cents, maybe you'll find it useful. Good luck with your grow!✌️🏻
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