Bio-Dex Plaster White ‘n Brite is a state-of-the-art acid wash ! Acid washing is a superior way to clean your pool, pulling metal to the plaster surface so it can be effectively removed. Plaster White ‘n Brite can lift metallic staining that is caused by old copper plumbing, as well as remove calcium deposits, metal, dirt, oil and grease stains from pool plaster. It can remove what’s left of a painted surface pool. This product will not etch plaster, is fast-acting, and reduces acid fumes, thus lessening the amount of scrubbing. It even works on swimming pools of all colors and types, including black plaster and concrete. If your pool surface can be acid washed, Plaster White ‘n Brite is the chemical of choice ! Plaster White ‘n Brite is: Environmentally safe 100% bio-degradable Non-corrosive Non-toxic Reduces Acid Fumes Fast-acting Eliminates Etching Cleans better than acid alone.