This is a double-action descaling filter. By combining the action of a neodymium magnet with a polyphosphate solution, it avoids the formation of limescale and it can reduce the presence of old deposits. The magnet breaks up the calcium molecules, causing the creation a new crystal, aragonite; this new material becomes harmless thanks to the polyphosphate. It is suitable for the treatment of potable water and it is perfect for domestic appliances such as boilers, washing machines and dishwashers.