Salt-free water conditioning Model-ETAC is a process that utilizes different methods to treat hard water without adding salt. It typically involves technologies such as template-assisted crystallization (TAC) or chelation to convert hard minerals in the water, such as calcium and magnesium, into inactive crystals. These crystals are less likely to form buildups and scale in pipes, appliances, and equipment compared to untreated hard water. Salt-free water conditioning systems are often marketed as healthier and more eco-friendly alternatives to salt-based water softeners that use excess amounts of salt to remove minerals from the water. However, it's important to note that salt-free systems may not be as effective in completely removing hard minerals as salt-based water softeners.