EcoPlus Adjustable Eco Air Pump, 2-outlet; Keep your aquatic landscape healthy with the EcoPlus Adjustable Eco Air Pump. It’s the perfect way to keep oxygen flowing in indoor or outdoor hydroponics, aquariums, ponds and water features. Designed with dual oscillating pump chambers and special diaphragms, it delivers high output and stable pressure and has an adjustment knob so you can control the flow. Since it’s built with a double-damping noise reduction system, it runs ultra-quiet while it pumps vital oxygen to your air stones. It’s oil-free so it won’t add colors or odors, and has a water-resistant housing that can stand up to heavy duty use.