Hi everybody, so for my next grow I am going to be using Coco. My idea was to have a gravity fed system with a 25 gallon container per 2 plants, drain to waste. I was wondering if anyone has done something like this and if you could steer me in the direction of an actuating valve that doesn't require a high psi to operate. All of the valves I've found so far require too much psi to work with gravity feed. I know I could always buy a pump and run it on a timer, I just thought this would be easier. Thanks in advance for any advice.