As soon as you feel the weight of this air pump you can tell that you are getting a lot of bang for your buck. The steel casing help adds weight to the pump which in turn helps reduce the noise from vibration. This pump will generate a steady stream of 2,700 litres of additional air into your pond. This will in turn rapidly improve the condition of your pond water. This pond pump provides enough air for a pond with 19,200 litres (14,900 if keeping fish and 7,500 if keeping koi).