OUTDR24 exodus cheese

absolutely normal - no need to fix anything (:

Can be genetic, can be phosphorous related, either not enough or too much......... I have had this a few times in the past and I do not think it affects the plant greatly.............generally genetic related, often in Sativa dominant strains. I would not be too worried.

A lot of people make a big deal about stem coloration. Alone it's largely meaningless. If coupled with other issues it MIGHT help point you in the right direction regarding deficiency. Looking at the condition of your plant, I wouldn't stress it.

not how acid base reactions work. you don't need to use citric acid. if you feel that is a cause use something else. I'd wager that the issue continues. could also be related to your ratio of nutes used in fertilizer. if certain ones aren't at critical levels around roots, the active transport occurring will deplete it and uncontrollable or difficult pH issues can result. h30+ + oh- = 2h2o - the simplest "AB reaction" in an aqueous solution. The result is 2 pH neutral water molecules and not ever "more" free hydroxide (proton acceptor = base) ph is the log scale of h30+ to oh- ratio. if you have way too much garden lime, that's more likely to cause what you see. Every promix bale i've used has dolomitic lime in it and have no problems with pH drift or major shifts. simply doesn't happen in 6 years so far. if you self-amended above and beyond, reconsider that step.