North American Salt Nature's Own Potassium Water Softener Cubes, 40 LbNatures Own water conditioning products are specifically designed to return household water to the pure, clear state nature intended. Natures Own products consist of only the purest ingredients. Regardless of the home, regardless of the need, theres a Natures Own product thats right for the job. Nature's Own works in any brand water softener unit. Nature's Own adds no sodium to your softened water. Nature's Own adds potassium to drinking water.