Superb tool for eradicating green water in garden ponds.
Max pond size 4500 Litres. (1000 gallons)
Max flow through 2200 Lph 500gph. (we have used these with lots more flow)
9 Watt UVC bulb.
Hose connection: 3/4", 1", 1 1/4", 1 1/2" , hosetails glow at night (so you know it's working) spares readily available (see hozelock spares) hosetails also can pivot for easy fixing, a very compact unit.