question on the watering cycle
 

Yes Ron on the watering cycle, when you say "30 on 30 off", do you mean flood for 30 min. or flood every 30 min? I dont have a timer so I dunno.

You don't need to flood for 30 minutes. That is only for people with 30 minute on time timers. You only need to flood the garden to wet the medium and roots then drain immediately and 30 minutes later do it again, 30 minutes later again and so on as long as the light is on.

The over flow pipe is only so you can run the pump for longer periods without the bottles overflowing.