That second picture looks like a zinc deficiency to me, but it's hard to be certain. That's the most common micronutrient deficiency, so maybe think about flushing the soil with a complete fertilizer that contains chelated trace elements including zinc, iron, and manganese.

The first picture looks like magnesium might be the culprit. You could try adding two teaspoons of Epsom salts per gallon of water, and see if that helps. If not, maybe think about supplementing a fertilizer that contains secondary nutrients...and just going from there.

Either way, it's going to be a long road to making those plants healthy again...so be patient, and don't be overbearing with the fertilizers, or you'll just make the problem worse. Good luck.