Hungry, lock out or something else

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Honestly, hard to gauge, looks like bacterial or fungal, but how could that happen in air pots? If you are running daytime 80F 65-75% rh, that hits all the right boxes for VPD if a little on the high side. VPD is meant for transpiration and the movement of water through a plant. There is no transpiration at night; Cellular respiration does not consume moisture from the pot. A high RH overnight cripples gas exchange and cellular respiration. A plant creates 10% of its energy as ATP during the day, 90% is processed at night. At 80%rh, stomata close entirely, and Cellular respiration will cease. A higher relative humidity (RH%) indicates a lower concentration of oxygen in the air. This is because water vapor displaces oxygen molecules. Possible there is a slight dead spot in terms of flow at the back of the tank, exacerbating the problem of lack of oxygen. With the 10°F drop in nighttime temps, the 65-75% rh becomes 75%-85%. I wouldn't mind knowing your runoff pH. If oxygen is short, this could well be causing anerobic fermentation within your pots as opposed to aerobic, soon as there is a shortage of oxy, acids can skew ph, so let us know the ph!, Hope she bounces back.

Okay that looks like Septoria. Remove Infected Leaves * Cut off all visibly infected leaves — even if it means defoliating the lower part of your plant. * Dispose of them outside your grow space. Don’t compost them. Increase Airflow * Use fans if indoors * Better airflow dries leaves faster and reduces humidity.

low k? low p? The third picture sure looks like low K and the damage at bottom does too, but then the purpleish black dots look like low P. A fertilizer formula won't work for all plants, but better formulas will work for a wider variety of plants. It's a soil so you can be 100% confident it wasa perfectly mixed and equal in all ways across each pot, too. this won't quite be a parallel but the end results of what is available around the roots is still the goal -- the formula behind jacks, megacrop, cropsalts, even promix pre-charge work on nearly all plants. I rarely run into one with issues, and usually so small i can just live with it for the benefit of ease -- 1 reservoir, many strains, or really 'from-seed' plants as that's enough for diversity in this regard to show up. I'd wager there are some reference tables for release rates and such.. could try to work backward from a targeted amount of available nutes over time? There's gotta be some reference info out there as far as tweaking soil constitution and resulting avaialble rate of each nutrient molecule. Since you seem to keep up on your pH ... The nute-caused lockout is possibly Ca.. (mulder's chart as a guide - don't see anything else that locks out both as far as a single culprit) Super soil may need some tweaks for wider use. hopefully it's not a nute-lockout situation... easier to supplement than it is to dilute a super soil, i'd assume, plus that'll fuck up all the other nutrient levels, too. Since the plant is a bit on pale side overall, i'd lean toward adding some P/K first and see how it goes. you have more infor at your fingertips.. did you amp up Ca content in soil or any other changes from previous use? that can help eliminate possibilities.

Give the plant some bloom nutrients and some cal mag or even better some type of micros that had cal mag in it

PK deficiency just start to feed those 2

At least for last two pictures from the right I'd bet funghi. Edit: Well, perhaps a low bet ;-) If they have space to fit in there should've been another cause. So I'm adding +1 to Tmasm but just a guess I think you are probably more experienced 👽

Phosphorus i think. Your diet is wrong, maybe ph swing or bad watering/humidity habbits adds up ...

Bem eu costumo usar poucos nutrientes, comparando com maioria donpessoal aqui é quase nada. Bem e mesmo usando muito poucos nutrientes, só vejo isso nas minha folhas quando o ph esta baixo. Confira seu ph do solo. Se escoar - 6 de ph é disso. Digamos que ph 6 é bom não é ótimo para solo mas é bom. Bem mas se rega com ph 6.6 e sair a 6 por exemplo. Não é bom, sinal que solo tem ph baixo. Escoar a 6 quando rega no dia seguinte que não rega e seu ph do solo sempre a descer. Até regar novamente com ph controlado, seu solo esta com ph muito baixo, rega e tem uma flutuação no ph muito elevada. Na minha ideia só tem ph certo no solo por algumas horas. Espero ter ajudado. Cultivo feliz