Transform your green water to a clear, sparkling sea of blue in 24 hours. Your pool will once again be blue. 2 treatments for 5,000 gal (gallons) of water; 1 treatment for 10,000 gal. Active Ingredient: Aluminum Chloride 100%. 2 part system: 1-2.5 lb, Green to Blue and 1 1.5 lb, Green to Blue II. Color code: Red.