Natural Chemistry Stainfree – 1.75 lb by Natural Chemistry

For Surface Staining:If the surface is stained, add 1 lb of Stainfree per 10,000 gallons as close to the stained area(s) as possible with the pump off overnight.

For Water Discoloration:If the entire body of water is discolored, put the pool on recirculate, add 1 lb of Stainfree per 10,000 gallons around the perimeter of the pool and let the circulation run for one hour. After one hour, shut the pump off and let sit overnight.

• 100% citric acid
• Safely removed metal stains from pool liners and finishes
• Effective on all pool surfaces – works great on steps
• Compatible with all sanitizer systems