The Pondmaster AP-Series air pumps have been designed to satisfy the requirements of a multitude of water-related applications. The non-oil lubricated motor is designed to operate efficiently and save energy. For outdoor applications, it is recommended that the unit be enclosed to protect it from the elements. Uses: * Oxygenating ponds and aquariums for a cleaner aquatic environment * Promoting healthier fish and aquatic plant life * Increasing the breakdown of fish waste * Preventing icing-over in outdoor ponds