Natures Own 40 lb. Potassium Water Softener Cubes soften water without adding salt and is guaranteed to work in all water softener models. It reduces scale buildup and improves the taste and quality of your water. These cubes are easy to use and maintain, simply add them to your water softener and they will work their magic. Enjoy softer, cleaner water with Natures Own Potassium Water Softener Cubes. Packaging: 40 lb. bag.