ok i have an actuall question. im desighning my ebb and flow table or w\e and in stead of my reservior undeer my table cant i put it up high and use gravity as my pump intead of an electric pump?? and then use a flow controll to better controll the flowor ( ihavnt researched timing yet) do i need an electric pump on a timer to make sure they get feed on time or is theyre some sort of electric valve i can find somewhere like what they use on lawn sprinkler systems... any thoghts? what is the usual time time for that if any one want to save me sum time looking