Hi
Bel',... uuughh, this is getting pretty bad my friend,.. usually straight run-off is not an accurate reflection of the actual in-pot pH, but it can at least offer a general idea about if it's overly acidic or basic; in your case, it's clearly too basic in there causing the lock-out of Fe/Zn at least,... (S locks out under acidic conditions)... these are immobile nutrient within the plant, meaning they can't remove them from established tissues and send them to new growth, so any such deficiencies will always show at the tops,... Bel', do you have water info for me? I need a pH, and if possible, a EC or TDS reading; we need to see if your water is very hard (CaCO3 rich),...something is driving the pH up, even with acidic nutes going in, and hard water can over time cause this from mineral build up,... Also, the soil, is it heavily amended with some sort of lime? .... *(look into getting an Accurate 8 soil pH probe, this is a critical tool for any soil grower; I know at least some EU folks can get on on Amazon or something)*... Damn, this will be a difficult fix Bel',.. getting such high pH soil down will be a challenge at this stage,... using low ppm water will help, getting your nutes down to 6.0, even 5.8 too, but with all the suspected CaCO3 in there, the carbonates will resist strongly any downward pH adjustment,... flushing may be needed, and again, a TDS or EC reading of the run-off can tell us how loaded with ions the soil is,... If only you were in the US mate, I'd have you order Optic Foliars Transport and a micronutrient supplement,.. it would allow a very speedy fix by foliar spraying.... you can still do this, IF you have the right supplement.. you want micronutes, not PK, though a little N won't hurt,.. I don't know what you have, or can get, but it's now a serious situation that if it isn't dealt with, will badly compromise your yields and quality,...