This Blagdon Pump has everything you need for a clear and healthy pond, combined in an efficient pump and filtration package. This complete solution features a pump, filter, UV clarifier, LED spotlight and three fountain feature heads. It aerates and circulates by pumping 650 litres of water per hour. The 5 watt UV clarifier kills green water and algae. The fountain head options bring beauty to your pond while the LED spotlight brings your pond to life after dark. The In pond 2000 is ideal for small ponds with a volume of up to 2000 litres, has a maximum pumping height of 1.25 metres and a maximum flow rate of 650 litres per hour. It will run the filter and fountain or feature/small waterfall in a fish pond with the maximum volume of 1,334 litres. The recommended size given is based on a fish pond in shade and over 75cm deep.