Cero WATER SOFTENER can be used to soften Hard Water. Hard Water contains Calcium and Magnesium Salts dissolved in water, when you add Cero WATER SOFTENER these Calcium and Magnesium salts precipitate out as slag and makes water Soft. Hard water can Damage your Skin. Add HALF a lid of powder to a bucket of hard water, stir. Hard Water gets Softened. Use the water as usual to Bath. Soft water will lather easily and will not damage your skin. Also the amount of Soap required will be comparatively less as the water will be soft.