Natural Chemistry - 07395 StainFree Extra Strength, 1.75 lb Container

Natural Chemistry 07395 StainFree Extra Strength is a premium stain fighter that contains 100% ascorbic acid. It quickly removes metal staining without adding phosphates to your water. It is ideal for treating staining on all pool surfaces.
Dosage Instructions:

• If the surface is stained, add 1lb of Stainfree Extra Strength per 10,000 gallons as close to the stained area(s) as possible with the pump off overnight.
• Before turning the pump on. Brush the entire interior surface thoroughly.
• Turn the pump back on and add one bottle of METALfree per 20,000 gallons of water. The METALfree should be evenly poured around the perimeter of the pool.