Powerful yet quiet pond air pump Outstanding value - includes all accessories you need!This pond air pump will produce an air output up to 1,200lph - perfect for ponds up to 8,500 litres in size (6,600 if keeping fish and 3,300 if keeping koi). Air pumps are an essential piece of kit for the pondkeeper. They introduce additional oxygen which keeps your pond and fish healthy. This air pump set includes a 2-way chrome manifold allowing the user to control the flow of air.