Blagdon Pond Oxygenator 1800, 6 Outlet Air Pump for Ponds Up to 10,000 Litres (Koi Ponds Up to 5,000 Litres), Suitable for Aeration and Oxygenation in Hydroponic and Aquaponic Systems, GreenCREATE A HEALTHY OXYGEN RICH POND Pond Oxygenator pumps are able to run numerous air stones at any one time, creating a healthy oxygen rich pond that will benefit your fish and biological filter bacteria WEATHER PROOF DESIGN the pump has been designed to be weather proof, so that it is able to be installed in most locations around the garden, or in a shed or garage close to your chosen power supply COST EFFECTIVE your Pond Oxygenator pump is both cost