Nitrogen deficiency - Would this work?

This is my first grow and I'm running a dwc system. I'm currently using GH Flora series to feed my babies and I have what I believe is a nitrogen deficiency . At 30 days old they have not had the smoothest road. They have been dropped/crushed, accidentally submerged, and had their light cycle interrupted on more than one occasion. My growing pains are killing them. And now this has started.



So should I get Nitrate of Soda - http://www.amazon.com/Good-Earth-Or...1?s=home-garden&ie=UTF8&qid=1303428578&sr=1-1 I hope not because I don't think I'll need 4lbs of it.

This? - http://www.amazon.com/Organicare-Ni...3?ie=UTF8&s=home-garden&qid=1303429801&sr=8-3

Or this stuff? http://www.amazon.com/Xtreme-Garden...NC/ref=sr_1_14?ie=UTF8&qid=1303428806&sr=8-14

I also haven't increased the dose of nutrients from 1/4 strength to mild or aggressive vegetative

Anyone? I really need some direction.

Increase the amounts of what you have before dumping unknown shit on them.

Go to 1/2 strength and observe first. No sense in creating problems if there isn't one. You might just be feeding too lightly for the plants needs.

Wet