Eliminator is a metal stripper and stain remover in an easy-to-use pocket format. This unique insoluble polymer material is contained in a small fabric pouch. When water flows through the pocket, the metals are attracted and bind to the polymer material. Once bound, they can no longer be released into the water. No metals, no stains. Ideal for use in swimming pools, spas, fountains and water features. The 4.0 ppm product will remove 4.0 ppm of total metals over a 30-day period in an 80,000 L pool. The product can be left in place until 4.0 ppm of metals have been absorbed. In low-metal situations, a pouch can last for years. The ideal use is to place the pouch in the Eliminator basket (sold separately) and place it in the hair filter basket of the pool pump.