The AAPA110L is perfect to run several Waterfarms or multiple air stones at once. It is an electrical magnetic air compressor in a high-quality aluminum alloy case, that is made with wear and tear resistant material for its cylinder and piston, and boasts high pressure and high output. The AAPA110L comes with multi-outlet divider (6, 8, and 12) that can be individually opened or shut. The AAPA110L Commercial Pond Air Pump comes in at 112 watts, can pump up to 110 Liters per minute, and has a total of 12 outlets. The Active Aqua Hydrofarm AAPA110L 112 Watt Commercial Air Pump is an ideal choice for pond and growing projects that need a powerful energy source to keep running and thriving efficiently for long periods of time. This includes 2 Hydrofarm AAPA110L Active Aqua 1750 GPH Commercial Hydroponics Air Pumps