I'm back. Let me do some research and refer some members to you whom I think will have the best answers for you. I am not widely versed in Organics or Aeroponics but I know who is. We'll get back to ya soon
Also... what about organics are you interested in?? Safety is not an issue since when using good products you are simply using solutions of basic elements and compounds. Going organic will usually involve a much riskier factor of dealing with the bacteria living in the feces you will have to use. You may want to reconsider your choice of action here.. but the information will be forthcoming shortly. Good luck
HG
[This message has been edited by HydroGrower (edited June 05, 2000).]