I'm still totally new to hydro, so I don't want to throw any answers out there that may be totally wrong. Maybe while you wait on another response, you can put some of the puzzle pieces together here:

Revised: The Complete Guide To Sick Plants,pH and Pest Troubles

Sorry I couldn't be more help.
Mr. Clandestine Reviewed by Mr. Clandestine on . Deficiency/Toxicity symptoms in hydro plants, help Literally, no. -DWC -T5 Flo -70-77* F -34-44% RH -Apprx 5th week in veg. -Fox Farm 3 Part w/ LK and CM+(alternating at res change) apprx. 10ml per 1.5 gallons / 3-5 ml CM+ and LK -Distilled water Rating: 5