An extensive range of water treatments, including extract of Barley Straw and Viresco Algae Suppressant, to effectively treat murky & green water problems including algal bloom. Ultraviolet Clarifiers are a highly effective means of continuously killing off single celled algae by applying UV radiation which causes the bloom to flocculate (clump together). The OASE Vitronic and Bitron UV Pond Filter options will tackle suspended algae in ponds up to 240,000 Litres (53,300 Gallons). Please note UV Clarifiers require a pump to pass the water through the UVC unit.