Don’t let the small size fool you! The 2010 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. Whether you have just a couple of gallons of water or 10-14 gallons, it only takes a hour or less to super oxygenate your nutrient water. https://www.o2grow.com/o2-grow-2010/