I am a long time soil grower-who recently has been giving hydro a try. I am currently running 2 somewhat makeshifts units, a 6 unit 5" pot with drip/bubble and a 6 unit 6" pot aero unit. I am looking at purchasing theGeneral Hydroponics AeroFlo2 Model 20 Aeroponic System, it is 20 3" pots, 2 rows over 8 ', however I am looking for feedback on using the smaller 3" pots and having 20 plants so close together. Also any comments on this unit in particular would be appreciated.