The Kockney Koi Yamitsu Hi Flow 50 Air Pump is perfect for increasing aeration in ponds and large aquariums. With an impressive air output of 50 litres per minute, the Hi Flow 50 is ideal suited for a range of applications in small to medium sized ponds. Supplied with a 10 Way Chrome Manifold the Yamitsu Hi Flow 50 Air Pump is ready to go straight out of the box. The Kockney Koi Yamitsu Hi Flow 50 Air Pump comes complete with 2 x Spare Diaphragms and 2 x Inlet / Exhaust Valve Assemblies and comes backed by a 12 month warranty for peace of mind. All aquarists know that fish require oxygen to live. What is not so obvious is that the bacteria that form part of the biological filtration process also require a good oxygen level to be able to perform correctly and keep your water to the desired quality. It is becoming ever more popular for air pumps to be used to raise oxygen levels in filters. This increases the biomass which in turn enhances the overall performance of the filter resulting in better water quality and healthier fish.