Hydroponic Guidance Needed! Which is better?

[Opie Yutts]

Green Air Cyclestat 4P Control Hydroponics New! - (item 140144470994 end time Aug-09-07 23:07:15 PDT)

Not entirely needed, but real nice to have. 15 minutes on is too much on time in my opinion. Kinda like drowning the roots instead of letting them have the air they need.