Hello chopficaro,
Here are just a few articles to get you started:
Maintaining Healthy Hydroponic Root Systems
Parasitic Pathogens: Infectious Diseases in Hydroponics
Surfactant Solutions
Troubleshooting in the Hydroponic Garden
Water Worries: Water Quality Issues and How to Deal with Them
P.S.
Some of the articles I have saved, the links don't work anymore. If you send me a P.M. with an e-mail address I can send you the text documents I have with the articles as attachments.