Zinc deficiency? veiny leaves.

quietlike

Active Member
Hi everyone, I'll get right to it.
I am in the my 2nd week of flowering, and my Nordle (CBD trial) has come up with veiny leaves. The leaves are still green, no curling or browning, just not as wide (thinner) and they appear 'veiny' thats the best way i can describe it. Ive had this issue before in soil, but it was due to high PH. I've checked my levels, and they remain steady between 5.8-6.2 (In hydro, dwc). I am using Lucas formula in a bottle (floraNova).
After doing a simple search, supposedly its a zinc deficiency. I went to the hydro store, they had nothing for zinc, but after wa quick serch there, he said that some people put in zinc washers in their rez. ive done that, its been a day. Will this work, if this doesn't, what am I missing? Is this even a Zinc deficiency?
Here's a pic, thanks!
I posted in another thread, maybe this will be a better place.
 
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