Liqui Phos 2000 is a concentrated sequestrant used to control corrosion and scale in potable and industrial water systems. Liqui Phos 2000 contains a unique combination of ortho and poly phosphates in an aqueous system that provides optimum protection over a wide pH range. This blend of phosphate works on a threshold activity basis, which means that sequestration can be accomplished at levels far below the stoichiometric amounts. A few ppm can inhibit calcium scale formation and tie up undesired metals.