Pool Stain Treat for removing metal stains and scale.
4 oz. Pool Stain Treat is a sequestrant and a chelator. In simple terms, it will coat the metal and calcium in the water and prevent it from attaching to the walls. Removes stains and scale. If you have a large issue, you may have to use the whole bag. Prevents metal stains and scale from building up. Add to water while filling spa to prevent scale. 1 to 4 uses per bag. 1 oz will treat 625 gallons. Pool Stain Treat will lower your pH, so check and adjust as needed.