Aquascape Pond Aerators oxygenate your pond which creates a more stable environment resulting in healthier fish and plants. Aerators can also be used in the winter to keep the pond from completely freezing over. The Pond Air 2 Aerator has a 3 year warranty, is extremely energy-efficient and quiet and includes 2 weighted air stones and 50 ft. of airline. 5"W x 5"L x 3.5"H