you don't want to grow 4-5 plants in one bubbler unless they are clones. Roots get intertwined and If you get a male plant, you have to chop off the stem and leave it there in the hole throughout entire grow. Plus from seed you're plants will bush into each other and you will be 1/2 your plant for nothing. I also feel that this type of growing from seed leads to higher potential for hermies...HTH ...lw

Using bubblers...you must have at least a 10 gallon tub or 5 gallon bucket for a bubbler. Small tubs are not deep enough. you need the height, for dwc

and you are right...you will need good ventilation to be successful in a closet! lw