Nava Chemicals 652133022 32-Ounce Stain and Scale Remover, 1-Quart Bottle
Concentrated Stain & Scale Preventer is an excellent product for fresh fill pools. Stain & Scale Preventer keeps scale from forming at the waterline, along rockwork and inside the equipment. It also prevents metals such as iron and copper from falling out of solution and staining pool walls or discoloring the water. Highly recommended that it be used on a regular basis as a maintenance program in hard water areas or where there are a lot of metals in the water. May lighten up stains that are already on the pool surface.