Electro gardening. UHF, negative ions, music, etc.

I've been growing for bout 3 years now, all but one crop grown in Hydroton or DWC. I've gotten the basics down (air, food, water) and can successfully grow bumper harvests. As an amateur indoor gardener I am always looking for extra things to increase growth rates and potency, usually in to form of a new chemical additive. I've been doing research on electro gardening and I would be interested in hearing from other people on their experiences with the practice of using electronic stimulation of plants. Eg. UHF, root stimulation, Negative ion generation, music etc. I would love to know how much current I could pass through an 80L DWC/hydro system with an EC of 1.6

http://www.motherearthnews.com/Sustainable-Farming/1984-05-01/High-Frequency-Sound-Uses.aspx

http://blog.lege.net/content/StimulatingPlantGrowthWithElectricityMagnetismSound.html

http://www.originalsonicbloom.com/

http://www.redorbit.com/news/science/1320718/electrical_stimulation_increases_chemical_yields_in_plants/

http://broadroot.com/content/green/plantricity0.html

A bit ghetto but still interesting.

http://broadroot.com/content/green/multirOOting1.html

http://broadroot.com/content/green/plantricity1.html