Green water algae is a real problem for most pond keepers, it can spread quickly and not only look unsightly but deprive fish and plants of vital nutrients and oxygen.
A UV clarifier can be used in conjunction with a filter system. As the water passes the Ultra Violet light, single algae cells are killed and clumped together, making it easier for them to be caught in the filter media. Bear in mind that a clarifier does not treat Hair algae, the thin strands of algae that can build up in a pond.
However big your pond and whatever your budget, there is sure to be a UV Clarifier for you here at Swell UK. Don't forget that we also carry Bio Filter & UV Combination units in stock. This gives you the two devices in one package, saving money and space in your pond.