i have a diy aero, i run 30 mins on 1hour off. previous grow i ran 24hrs on, 30 on 3hrs off and 30 on 2hrs off, and 30 on/off. 30 on 1hr off seems like the best compromise i can get out of my 5$ timer, and my roots are sick so it's what i'm going to keep using. One on five off would probably be best for clones though.
I use GH nutes, it works for me, FN is reported to be bad, can crystalize and fuck arround on you with not mixing itself well and all kinds of other horror stories. People have success too, i'm just saying i'd shy fron FN. FF is sick and should give you awesome buds.