Good morning Capt, I’m running one 12 gallon reservoir. When I set the third 2 pot system up, I put a shut off valve slightly upstream of each pot system knowing I would have different stages of growth. I top feed those that are not up to the nute strength and then open the flow valve when the others can handle the nutrient level. I’ve been filling the reservoir of 4-6 gallons only. Run off checks are much easier, I also put a shut off valve at the end of the pots to open and check the run off. Auto pots USA is where I purchased mine from. It’s an easy set up and easy to maintain, I like the ability to close the flow off to each pot. Had 2 seem really saturated, but having the ability to close the flow to individual pots allows the others to feed and the wets ones to dry out a little. Only find this to be true with a soil medium, going to run coco on the next 2 coming up and see what happens. The biggest benefit I’ve found is how easy it is to maintain your PH, PPM and EC. Recommend the few gallons at a time due to weekly nute increases. So for me the auto seems to like somewhere between 1/2 to slightly more on the feeding schedule. Maybe it’s just the Skittlez?? Will see when I drop the Sour D and Northern Lights.