I also have added an additional flood to my flood cycle, I was doing it 2 times a day now I'm doing 3 times a day. I was thinking maybe doing 4 15 min intervals, 8am, 2pm, 8pm, 2am, lights go on at 8pm and off at 8am. Right now I am feeding at 8pm, 6am and then 2pm. No reasoning behind my current schedual other than its the result of my randomly adding a flood and not thinking ahead. I'll have my flood schedual figured out after I do some more research. I figure i havent been able to research a definite answer because not all flood and drain systems are the same, and something like a different medium(hydroton, rockwool, etc. etc.) is going to differentiate what scheduals work best with what systems.