Brown spots, PH in run-off is in the high end (6.5~)

Hey, I would really invest in a proper ph pen and an ec from Milwaukee or blue lab. Making decision based on inaccurate data is always very difficult.

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Looks a bit thirsty to me, I would try and water them a bit more. I also read that PH as 7-8 not 6.3 like in your diary. Might want to lower it a bit more given your grown in coir and perlite. monitor runoff for EC and PH and adjust as needed. If spots continue reevaluate from there. should fix the other stuff first as it maybe the source of the issue. Good Luck!

Hey Pal. See the sides of your leafs. The edges are all sticking up. This is caused by too much N. And everything else is nothing more than a by product of been locked out by excess N. Get your NPK ratios sorted. And everything else will fall in place. Good luck.

Symptoms: Intraveinal chlorosis, some tacoing of leaves, and leaf tips curling down, yellowing of leaves. Here's a link that will show you every deficiency and toxicity of different nutrients and how to correct them. Now that you know what the symptoms are, you can diagnose and correct the problems with this article: https://dutch-passion.com/en/blog/a-visual-guide-to-cannabis-deficiencies-n987

Oh, and btw... the leaves whose edges are curling up - that's an indication the temps are too high... if you can, bring it down into the 70s... :-D

Well, I don't think it's manganese... that's a pretty rare deficiency to have quite honestly... Poor girl... she's really been through the wringer, hasn't she?! Let's get back to neutral here... give her a good, solid flush - 15 gallons of water that's been ph'd to 6.2 through her and let her dry out... when she's dried out, give her nutes again but at 1/2 strength and add in some calmag (1tsp will do). You should also add in a PK booster (I use General Hydroponics KoolBloom liquid and love it) - again, just 1 tsp. You can resume your nutes at the same levels that you're giving now but after that first feed. And I would definitely always include the calmag and the PK boost.. Personally, this is looking like a phosphorus deficiency so the PK will be extra important. And try your best to keep the pH at 6.2 - that's the ideal pH for all nutrients to be available to the plant. Good luck! Going to keep tabs on this grow!

These are the first signs from a manganese deficiency. Here is a link from the RoyalQueenSeeds company with everything that you need to know how to deal with this deficiency. https://www.royalqueenseeds.com/blog-manganese-deficiency-in-cannabis-plants-n577