4 Things to Know About Using Ascorbic Acid for Metal Pool Stains

Ascorbic acid is the safest and most effective treatment for copper and iron stains. Drop crushed vitamin C tablets directly on the stain or use a pool-specific ascorbic acid product. It works in minutes without damaging the liner.

Avoid chlorine shock and muriatic acid. Chlorine oxidizes metal stains, making them worse. Muriatic acid can damage the liner if not diluted properly. Ascorbic acid is the reliable alternative.

After the stain lifts, prevent recurrence with balanced pH and a metal sequestrant. Metals usually enter from fill water or algaecides. Test your source water if stains return.

Skip expensive pool-store stain removers. Ascorbic acid is cheap and effective. Scrubbing with specialty products is unnecessary.