In order for me to drain the farms into the controller, I would have to have them sitting higher than the controller to encourage the flow back to it. It just takes much longer to do that way and I can usually have all my plants drained, flushed, and new nutes mixed in half the time it took me to do that. Plus when it comes time to weed out the males, I have to disconnect all the tubing and reconnect so that I don't have any spillage from the barbs that were in the other waterfarms. I dunno man.. just seems way easier this way for me. If you know anyone who wants a controller let me know. Still have everything it came with, although I did have to cut the tubing for the farms. But I am asking 60 for the setup plus whatever to ship. Thanx for the info tho. My clones are doing great so far. They are nice green and very happy. I replaced my fluoro bulb 24" with a new one and has made a difference for sure. I'm just waiting on this girl to do her thing and I will plant the clones soon after.