Vesta salt-free water conditioners feature Filtersorb SP3 media. The media takes advantage of a technology in which the chemical structure of scale forming minerals is changed. Calcium and Magnesium hardness is transformed into non-soluble micro crystals. This technology is so effective that it requires a contact time of only seconds.
The media is used in an up-flow system with no back-washing necessary, therefore only an in-out head is needed. FilterSorb SP3 transforms the dissolved calcium carbonate (temporary hardness) into non-charged, neutral chemical bonds. The bonds are completely stable and can't attach to any surfaces, so the chemical bonds are just rinsed away by the water flow.
The size of the bonds is so small, in the range of nano-meters, they can only be seen with a microscope. Therefore the effect is the same as if the water was free of temporary hardness (calcium carbonate). The media is used to clean pipes from already existing scale and to help protect pipes and hardware from scale.