Hey old442, I have been using GH in my soil grows and soon to start a ebb flood tray using GH.I dont have anything agianst AN but if you buy all the stuff they say you should use, its going to cost you.I like AN and I get there news lettler all the time.That connaisur is like $54.00 bucks a liter.I looked in to the feeding chart they say to use and you will use about one liter to a grow.Connaisur A&B $54.00x2=$108.00.But if dose the job they say it dose {60%}than I want some.I readly would like to know how it works out.I like to keep thing simple to start with, and than see what I can get.Please post more on your grow with AN. Peace