How It Works Calcium ions, magnesium ions and bicarbonate ions in untreated water form scale on the inside walls of pipe, exterior of fixtures and on heating surfaces because crystallization is not taking effect efficiently between the ions due to their suspension between water molecules and the need to come together in the proper alignment to form crystals. Therefore they form as scale on the surfaces of the water system. The system is a simple “physical water treatment” known as TAC (Template Assisted Crystallization). Crystallization form a definite shape. The crystal formation on the microscopic crystals (seed crystals) created on the beads and released in the water stream are the lowest energy reaction possible between the ions therefore existing scale will be dissolved back into the water stream by reacting with and forming crystals. INCLUDED: Salt-Free Unit: Scale Prevention Media 8"x44" Mineral Tank (Almond,Black or Blue) Distributor Assembly In/Out Tank Head Bypass and Adapters Carbon Unit: 9"x48" Mineral Tank (Almond,Black or Blue) Backwash Control Valve Distribution Tube 1 Cu ft Carbon media Pre-loaded KDF 55 Mediaguard pre-installed