Charles Austen V SeriesThe V series air pumps are ideal for larger hydroponic tanks and aquariums; they allow several air stones to be run from one pump so that a large amount of water can be aerated at one time. The filter cover on each pump can be removed so that clean air can be drawn from outside the grow room or tank house, making them ideal pumps for both aquatic and hydroponic applications. Robust alloy casing provides whisper quiet operation. Supplied with a barbed brass connector & manifold. Four output sizes from 10 l/min up to 60 l/min. For smaller reservoirs and propagators that don't need this much airflow, see the LD/ACO 22 Series; for tea brewers and water bubble features specifically, see the SSH Series.