Salt pebbles are sodium chloride (salt) in small, round pebble or tablet form, used for water softening and in salt-water swimming pool chlorinators. They dissolve evenly and progressively to prevent limescale, reduce detergent use, and maintain equipment health. High-purity salt pebbles are also used in the food industry and, in their pebble form, can be effective for de-icing and providing traction on icy surfaces.