Water Works from PolyPortables is a safe portable restroom washdown concentrate that is high in fragrance, biodegradable and phosphate-free. The formula combines a blend of ingredients that fight odor-causing germs, leaving portable restrooms fresh and clean well after washing. It is offered in several long-lasting fragrances, and can be mixed as low as 8 ounces per 275 gallons of water. It is safe for brush-down or pressure-wash applications, and can be added to a truck’s freshwater holding tank to eliminate slime and algae buildup. 800/241-7951; www.polyportables.com.