The 2020 unit gives you the option of using both emitters in a 20 gallon reservoir or splitting them up into two different 10 gallon reservoirs. Either way, this unit is ideal for stealth closet growing, starting plants in your cloner or even for use in your propagation room. The unit makes no noise and will not heat your water. It only takes about a hour or less to super oxygenate 10-20 gallons of your nutrient water. More info: https://www.o2grow.com/o2-grow-2020/
