in my oopinion you could grow 6 plants in that system i have a 5 gallon res. tote and i was going for 3 plants but i started the 3 a week late so i removed the weak link but i have a top feed setup and the pot set on top a drain back into the res throught holes in the lid and the clones i put in the setup have grown to 8" tall in two weeks and i just dump in some sensi 2 part and a little bloom so they dont have any deffs. oh and my personal fav. superthrive that shit amazing