Bio-Dex model number PWB32 Plaster White 'N Brite Acid Wash, is commonly used in pool and spa's for cleaning and whitening plaster surfaces.
The acid wash helps to remove stains, mineral buildup, and discoloration from pool plaster, helping to restore the plasters bright white appearance again. Performing an acid wash can also help remove algae or other growths, and help improve the overall look and cleanliness of your pool.