I agree with Sciens wiz, if you don't get it to recirc. then each farm or grow cell will be different PH's and ppm's....I'd daisy chain each bucket w/ 3/4 in. tubing, to a central res....
I diy'd a RDWC w/ 10 gal. buckets, a res, and a controller bucket....
Each bucket and the res has airstones, the res has valves that I can close, and the controller bucket pumps the water from the grow buckets back to the res, for ph or ppm checks...
then I open the valves and gravity fills the buckets back up, and the recirculation begins again...I also use drip rings, I've found that I can grow bigger plants quicker and keep them happier in bloom w/ the drip rings....I have seen this done w/ 2 to 20 gallon grow cells, so Jump in and get yer feet wet, the water's fine...