pH Up 50% NaOH - 5 GallonspH Up 50% NaOH is a highly concentrated solution of sodium hydroxide (caustic soda), used to raise pH levels in water and various industrial processes. This clear, colorless, and odorless solution is extremely alkaline and effective in small amounts. Uses: Commonly used to increase pH in water treatment systems, swimming pools, and spas. Also found in manufacturing settings for pH correction, and in the production of chemicals like soaps, detergents,