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- fine-ass '22 harvest!
... ah, as expected, the pH went up some,.. taking a reading soon after feeding will definitely skew the reading some! Still, with the +/-0.2 resolution of the A8, you're just borderline for P lockout, not bad at all really,... damn! it's moving up higher and on more leaves? And her sister (same strain) is doing fine? .... no, a flush isn't called for yet IMO; what's you water source? I'm thinking some fairly hard tap water and/or some all carbonate based Ca-Mg, not pH adjusted down, will get some buffering minerals (CaCO3) in there and might help swing the pH up a bit, plus a little tweaking of the nutes, like mostly bloom (higher P-K) to cover the bases for this being just a lack-of deal, and this pheno' is being bitchy about it,...
but I do kow that gave her a feed of the above nutes with some mammoth P and Recharge and rhizotonic also and the pH came to 6.5 so I downed it to 6.2 as per A-trains preferred feeding range for promix.