Young plant from seed - Potassium def?

[applepie]

This Original Sour D was from Cali Connection seed. It grew very nicely until a couple days ago when I noticed these small yellow dots/spots. There is a tiny hole in one of the yellow spot. Can anyone tell me if its potassium def? Thanks!!

 

[applepie]

Oh,... it's in a 4x4 rockwool under 2' T5... In Ph'd water only from the day it sprouted. two days ago I started to foliar with 0.7 ec AN A+B. Any help is much appreciated.

 

[Seamaiden]

Doesn't look K- to me. If you're asking about the spots, I'd be looking for some sort of bugular activity. Right now it's mostly cosmetic, IMO.

 

[applepie]

Thank you very much Seamaiden.