Periodic Products CUL-1MO Culator/Metal Eliminator and Stain Preventer for Swimming Pools
The only way to permanently remove copper, iron, manganese, cobalt, nickel, silver, lead, and zinc. Simply place a CuLator PowerPak in the skimmer basket, as water passes over the PowerPak, metals are trapped inside the bag. Non-toxic, works in fresh, hard, and salt water. Does not interact with other pool chemicals. Works well with metal based algaecides and mineral based water purification systems.