I just bought one these and put it together. I'm a little confused on how to set up the control unit though. I understand how to set it to flood and how long to flood for, but for the life of me I can't find a clock so even though I can set it to flood every 3 hours for 15 min I don't know when it will start. Should I just plug the control unit into a timer that turns it own a 6am and turns off at 12 midnight since I'm not going to water with lights out? Sorry if this is a dumb ass question I'm new, and this is my first ebb and grow.