Need help

Hello,
I have posted 3 times tring to get a answer but know one has replied.
I'm making a cheap areo-clone system using the info from the Grow F&A.
The info states that a timer is a must but it doesn't say the time period that is needed. I'm assuming the timer is for the air pump.
Info on this cloning system would help.
Thx

timer deffo for lites. does it not say, in faq, how long to keep on the air pump. if it says keep it on for, say 18 or 12 hours then put it on a timer. and the lites too. on a times. plants need routine.

Private message filthy fletch he's our aero guru