3-L tank design. (A) External view showing the airlift assembly, the external standpipe that regulates the water level in the tank, and the ø150 mm pipe attached to the 150 mm end-cap forming the main body of the tank. (B) Cross-section view showing the location of the nylon mesh that separates the draw space and the culture chamber,the airlift and stand-pipe inlets located under the mesh in the draw space, and the airlift outlet that returns water drawn from the draw space to the culture chamber