Highly efficient UC clarifiers, which permanetly eradicate green water, for ponds containing up to 35000 Litres. Durable, highly efficient UV bulb witha capacity of 8000 operating hours, developed in cooperation with Philips. Easy to install, efficient construction foir amximum performance. Little maintenance required, water proof, compact construction. Standard connections for all regular hose pipes. Safety device, can only be operated when assembled. VDE tested, CE certified - safety and reliability assured. 2 Year guarantee. Replacement bulbs and quartz glass tubes are available. Please make sure that the flow rate it can handle matches the flow rate of your pump. 5 different models to choose from:- UV Clarifier 3000 for ponds up to 3000 Litres. UV Clarifier 7000 for ponds up to 7000 Litres. UV Clarifier 10000 for ponds up to 10000 Litres. UV Clarifier 20000 for ponds up to 20000 Litres. UV Clarifier 35000 for ponds up to 35000 Litres.