Our largest AeroFlo2 unit, the AF260, features sixty plant sites. Growers who wish to expand this system can enjoy a total of one hundred and twenty plant sites with the addition of our AeroFlo2 60 Extension Unit. Users can choose either to configure the grow chambers on the same side or to stagger them in order to cover a larger area or to grow larger plants. The AF260 and Extension Unit feature the generous 40 gallon Panda reservoir.