Hydrofarm Active Aqua Air Pump, 8 Outlets, 12W, 25 L/min Super silent with multi-level muffler Special artificial rubber to keep a steady air flow output and pressure that can be adjusted freely Low power consumption 400-GPH, maximum amperage is 0.1 and maximum decibels is 45 12-watts, 25 liters per minute Super silent with multi-level muffler Includes 8 outlets for convenience Special artificial rubber to keep a steady air flow output pressure that can be adjusted freely Low power consumption Rated 400 gal per hour