he explains how to make the setup throughout the thread. the water isnt pumped from tank 2 to tank 1, it flows there on the smaller side pipes.
I don't think this is what most would call a cheap way to grow, the chiller alone is several hundred dollars, I would estimate to duplicate his setup you would need at least 2000-2500$. he has several hoods of varying sizes, he has a 300-400$ chiller, pumps, insulation, permanent tds and ph meters, and an inordinate amount of time on his hands to build and tweak a rig like this.
nice setup earl, I wish I had the time, space, and money
