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How much of a pump do you need for this system? I like what you have done, great work!
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Any of my pumps will work for this system. It's only actually pumping 1 to 2 feet up at most (pump ratings call that the "head height"). The tube holds about 5 gallons when filled. About 1 and 1/2 gallons stays in the tube when drained. The pump I am using is actually way to strong for the system. It will fill the system faster than the overflow can drain it, so it will overflow out of the top if I didn't adjust it. The pump inlet is set at a low setting but I still need to do more to reduce the flow. I took a "T" connector and put it inline with the feeding line, then connected a small piece of tubing to the middle horizontal connection. This splits the feeding line into two lines but only one end goes to the plants the other end stays in the reservoir.