The Active Aqua AAPA45L 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 AAPA45L comes with a 6-outlet, high-quality stainless steel & copper air manifold with individually controllable air outlets. The AAPA45L Commercial Pond Air Pump comes in at 45 L/min, 20 watts, has a GPH of 713, and has a total of 6 outlets. The Active Aqua AAPA45L 45 L/min 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.