Help with spots on DWC White Widow 2nd week of veg -- nute burn? PICS

Need your help..what do you guys think?


stats: DWC, 20 gallon bucket, waterline about 1 inch underneath the net pot
plant is about 2 weeks old
dual line air pump, with 12inch air stone
dutch nutrient formula nutes
water was flushed two days ago, added 15ml of A and 15ml of B. (about 25% of regular dosage)
http://www.dutchnutrientformula.com/nutrient feed schedule.pdf
i noticed these spots last night.

newer leaves are slightly yellow, which is obviously an N-deficiency, but i'm afraid of adding more nutes until i get these brown spots sorted out.
any tips?

here she is two days ago, before i flushed her out and added nutes. looked fine then.

I had a DWC whitewidow using dutchmaster gold A+B as well, I also got some leaves spotting. I never flushed them and eventualy spots went away, guess plants sometimes get used to it?

did you find some of the leaves turned out a little crispy?

bump .. anyone else want to chime in?

yeah but only where i had got em wet. not the whole leaf but areas that turned brown and died

ok, you don't need to flush....a flush is just water no nutes at the last 2 week of flowering. Do you mean you changed the water/cleaned out the res? Spots could come from a ph problem or not having nutes if straight water. Maybe join the DWC club. Hope it helps.