Your opinion?

K-deficiency will start in leaf margins.. however.. if balanced there's no way that'll be a deficiency at 1100ppm runoff. Nor at 660ppm. That's more likely lockout from previously high EC levels, even if it crept in slowly. A 2.2EC (1100ppm) is really high - and likely even higher in the soil than the runoff. I see you are in soil. So, either started too early or had too strong of nutes that slowly built up to this, even if you didn't see issues early on. Trial and error and always a balancing act with soil, regardless, because it contains its own nutrients to start at unknown levels. Once those are diminished and you've offset that over time, a full feed shouldn't be higher than 1.3-1.5EC, or about 650-750PPM total. With at least 10% runoff (waste, down the drain), it'll maintain that level. good ballpark ideas if you calculate from guarnateed analysis lables + doseage. 120-130 N 50-60 P 190-210 K the rest should dial in with it.. if you have to supplement any Ca/Mg etc, that somewhat will depend on your tap/well water contents. Calcium is reactive, so it sometimes is not in an all-in-one mix and more often not necessary to supplement in any decent 2-part mix.