Small Aerator for Ponds up to 16,000 Gallons and 4 Feet Deep -- Increases water circulation and oxygen saturation, improving the natural ecosystem. Ideal for a backyard pond or small outdoor fishpond. Improves Water Quality & Clarity -- Bottom-diffused aerators push air through dual diffuser sticks and into your pond. Aeration supports beneficial bacteria, clearing water and eliminating pond muck. Quiet Operation & Energy Efficient -- Powered by an energy-efficient electric compressor, with near-silent 24/7 operation. Aerate your koi pond, water feature, or water garden for just pennies a day. Various Uses -- Aerator kits can also be used in a large aquarium, stock tank, or hydroponic application. Any small waterbody will benefit from these aeration kits, which are designed for 24-7 use. Maintains Hole in Winter Ice - Aeration kits release small bubbles from diffuser sticks, creating water circulation and maintaining an opening in ice. Allows toxic gases to escape, benefiting fish.