Nitrogen deficiency?

Sorry for making yet another post asking about a nutrient deficiency, but I thought I’d post a couple of photos and get some other opinions.

35 days from germination, day 10 of being in the rdwc system. I was experiencing nitrogen and calcium deficiencies across the board after transplanting. Upped the nutrients and everything is looking healthy with the exception of this one plant. It’s still showing some droopiness, wrinkled leaves, and what I’m calling yellowing of the leaves (to me the leaves appear slightly wrinkled and somewhat mottled looking. Perhaps that’s just yellowing I’m seeing?)

Current readings:

PH 6.09
EC 0.9
PPM 680

EC and PPM are significantly higher than I anticipated them being at this stage, but like I said all of the plants were deficient across the board. At current EC/PPM for the last 3-4 days the other plants are back to looking/getting healthy. Is this one just lagging behind? Should I give it a couple more days to see if it perks back up? I’m not seeing any new yellowing and/or droopiness on any of the other plants.

Thanks in advance for any tips/advice!

Looks fine,just a tiny bit of tip burn.No problem.