i have a 5"H 38"L 18"W rubbermade tub that i plan on using for about 6 plants my question is will this be enough room for the roots? hight is a HUGE factor for me as it need to be stealth 
and also would it help if i have a separate tub as a reservoir? i would have room for the extra tank but not to have the plants in the same tank
and also would it help if i have a separate tub as a reservoir? i would have room for the extra tank but not to have the plants in the same tank