Maybe I could add that I grow in organic soil, and so the more floor space i have for soil, allows for more nutes, roots, and such so my experiences may not hold true for hydro growers, and until i get my aquaponics set-up tuned I can not make any judgments about hydro growing in this way, though we have grown hydro many times no actual comparisons of rooms were done, oh and most hydro tables fit my rectangular model...err. Yah, i think I just answered myself. Gotta love it!
PZ-> Komposter
i used to grow hydro but now stick to soil , chem and organic , i get far more even growth from soil and more yield per area not plant .