Pro Products LLC, of Fort Wayne, Ind., has added hydrogen peroxide (7 percent) to its existing line of water treatment chemicals. Hydrogen peroxide is a powerful oxidizing agent for hydrogen sulfide. Some of the benefits of using this product include a more powerful oxidizer than chlorine and potassium permanganate; it decomposes into oxygen and water; its low concentrations have no odor and are non-flammable, and it’s available in one gallon and five gallon containers.