Here is my sealed room with my alien v system! 57l buckets but that's to the rim it's 50l to the line where they marked it ti the bottom of ya baskets ! Roots just dangle down into the bubbling water no air pump ..they use a ventura and a slight curve in the bottom of there buckets ! So water comes in from under the buckets it creates a swirl when the ventura hits the water coming in from the bottom.so the air comes into ya buckets with the ventura pulling in air either from outside the room which I prefer .as it's a sealed room with gas they would be pulling air from inside room and pulling the gas aswell. Obviously gas is poisones to the roots so I have air getting pulled in from outside..I use advance nutrients cultivator series 3 part mix .. I do add a few additives big bud and nirvana and bud candy and over drive on week 6 until 1 week before harvest..there all top of the range additives to ya girls! Seeing is believing if ya haven't tried it !my pH I have in veg is 5.8 and then as the flowers mature I higher it to a 6.3 to suck up the additives they need in latta flowering.. these photos was in week 4 in veg ! Time for defoilating and lollipoping.. as u can see ya can't see thru them they are solid with plenty of branches..these can produce massive colas when ya environment is on key and ya vpd and dli is perfect! 