Take your growing to new heights with the Supreme Hydroponics AP-4 Air Pump, by Danner Manufacturing. This handy air pump works to keep your nutrient flow aerated for optimum root growth and healthier plants. Pumping 275 cubic inches of air per minute from one outlet at 2.0 PSI, to a maximum water depth of 4 inches, this pump is ideal for optimizing smaller hydroponic setups. A 3.5 watt motor keeps energy consumption low and operates extremely quiet for a more pleasant growing environment, and this pump is compatible with standard tubing so it???s easy to install. Grow more efficiently with the Supreme Hydroponics AP-4 Air Pump, by Danner Manufacturing.