Chelates metal particles, prevents staining of pool surface and removes light stains. Higher tolerance to chlorine and temperature than Rust-N-Scale. Great for warm water therapy pools and spas. Clean filter, pH 7.5 or higher, add 1 qt. per 10,000 gallons, weekly 13 oz. per 10,000 gallons. Haviland® Concentrated Clarifier will aid in the speedy removal of suspended metal particles in the water.