Many options to select from. It is superior in the treatment of scaling caused by hard water minerals, plus controls staining caused by the precipitation of iron and manganese. HydroBlend TM utilizes the same principles of preventing scale build-up and corrosion control as polyphosphates. However, this is accomplished without any of the problems which often plague the use of common polyphosphates.
Polyphosphates is a soluble mineral compound which acts as a sequestering agent when added to water.
Sequestering is simply the ability or tendency to tie up and hold in solution other minerals such as scale causing calcium and magnesium. The polyphosphates form bonds with scale causing minerals which make them more water soluble. Therefore, the hard minerals act soft and remain in solution, as opposed to depositing scale. The quality of the polyphosphates will determine the ability for it to hold scale causing minerals in solution. Higher quality phosphates such as hexametphosphate and Siliphos perform better than orthophosphate which is a lower form of polyphosphates.