Aquapure T-500 is a Sodium Dithiocarbonate solution (Na2CS3) designed for use as an efficient metal precipitant. Aquapure T-500 provides an alternative product that is less toxic to aquatic species than some of the diethyldithiocarbamates. In addition, the volume and weight of sludge per unit of metal precipitates is substantially less than alternative products including the dithiocarbonates for selected metal types.