The top feed micro tub on a chiller is def the way to go for early root growth. Cant be happier with the size and color of the roots I have. Everyone was getting crowded in the little bin, so I went ahead and finished the large system. Went together much easier this time around and the smaller black pipe is def large enough for back flow but small enough to keep water amounts reasonable. My foam jackets fit perfect, and I’ll just have to wait and see if it helps maintain the cooler temps. Not sure what I’m going to do with two left over. Maybe soil pots on the side, I’d hate to kill them off but my system is what it is.