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- fine-ass '22 harvest!
..looked the medium up, my bad! I often hear pure coco referred to as "coco peat", a misnomer for sure,... This is indeed more like a true soil, and the pH is fine,.. that said, you have a lack-of Zn defc., best solves with a dedicated micronute supplement like Earth Juice Microblast, done with both soil dosing and foliar treatment (fastest way into the plant),... You'll need a wetting agent (Coco-Wet is may fav') to do this properly; it takes the surface tension of the solution down, so the spray covers and coat better, instead of just beading up... spray tops and bottoms(!) of leaves , more stomata in underside, which is the only way in,.. do this out of direct blasting light until dry,... 2-3 rounds over a week or so will speed recovery greatly!