Deficiency with botanicare kind mid flower?

Any thoughts what May be causing this chlorosis to show up around week 5? chlorotic growth starting from the tips on the mid-upper plant with purpling of stems and petioles tat continues to worsen till harvest with a significant reduction in yield? Using botanicare kind@8ox base, 18oz bloom in 40 gallon res with ec1.7 and ph5.8 in ebb and flow tables with rockwool. Have used liquid karma@4oz and sweet@8oz previously with no difference in issues so left them out this time... Any thoughts are appreciated

Maybe you need some more potassium? Being week 5, they could be munching right through everything you are feeding them. Otherwise I'd perhaps suggest using something to help chelate iron, like a fulvic acid product. Regardless, flushing would help eliminate any nute lock issues.