The plant on the left kept growing a lot faster than the other, and I've been wondering why. Both Sundae Driver cuts from the same plant, they both rooted pretty much the same time, so i didnt understand. Today I think I figured it out. In the control bucket, I have a pump with a venturi valve that is on the left side of the bucket close to the pipe that goes into the left bucket. I moved the pump over to the right side to see if my hypothesis is correct. It seems to be the only reason I can think of though.