Flood and Drain

How many times (minimal) a day do you have flood and drain your growing medium (clay pebbles) for a succesful grow? Also how long should you allowing for flooding before you begin to drain the system? Any help would be good.

Cheers

Hi madfreek,

I watched a grow guide on dvd the other day. The guy was using a flood and drain with clay pebbles just as you are. He flooded 3 times a day (while the lights were on) for 15 minutes each time (that was the minimum his timer would allow).
He had an overflow going bach to his resivour because in 15 minutes his tray would be full and it ensured no flooding.
Hope this helps.
Cheers

Thanks collifish, much appreciated