Clones, Cherry Kush and Kyptonite HELP!

Got these 2 baby's from a friend who runs a large scale grow. Being clones he rooted them in FF soiless mix. After a week of vet in their mix and they were large enough to putinto pots, after another week in the soil they both start getting spots and yellowing leaves later followed by necrotic dead ends. I didn't give any nute while they were in their little party cup pots to root nor after the transplant. Soil ph is 6.4 after amending the mix with sulfur and tap water is 7.0 after its filtered.

I can't tell if its desease/mildew or deficeincy?

Looks kinda like zinc def and/or potasium def...or...early black spot

Np my friends if they were on under leafs...so u can put some micro nuts (a little as 50 ppm +)

Looks like too many nutes to me...

Hmm i haven't given them anything but B1 when i transplanted at 2tsp per gallon. Being so young i didn't want to give them any veg nute till about now in this timing had they not had this problem.

So what should i do here? Minor veg nutes with a little more B1 micronutrience?