Cal mag ... I this grow i use different water star...

I think you want to increase the dosage of all your nutrients, seems a bit to low for this stage and you can see the beginning of defeciencys. You're not supplementing any calmag either so just adding this to the feed will improve considerably 👍🌱

I think that's trace element related, which points to pH. Try getting res down to 5.5 and see if that helps. Mg usually has dots if that advanced. Zn and Mn look more like that, i think. Zn will be helped with a more acidic reservoir... your hydroponic ferts likely provide enough of this, but worth looking into before making a decision. Check ppms of what you provide. Some Cl is used by a plant. Tap water is better than RO water, except in extreme contexts of very hard water or unclean water etc.

Looks like your having a magnesium deficiency A light green or yellow coloring will begin to show on the veins and edges of the lower & older leaves , hope that helps