Apollo Horticulture AH AP-2.5WX2 3-LPM Air Pump with 2 Outlets 1  Apollo Horticulture 2.5W 2 Outlet Air Pump Pump Specs  AC: 110-120V / 60 Hz / Pressure: 2.18 PSI Output: 3 LPM  47 GPH / Decibles: 21 Pump Dimensions: 2.75x 4x 2.25 Package Includes: 1  Apollo Horticulture Air Pump