Read Prior To Application section on bottle before use.
Treatment of Visible Pool Algae
Superchlorinate pool water prior to application and circulate 1 to 2 hours before moving to the next step. Pools having light to medium pool algae growth, add 16 fluid ounces of this product per 10,000 gallons of water directly to the pool with the pool pump operating. Pools with heavy algae growth, add 24 fluid ounces per 10,000 gallons of water. Brush pool to increase circulation and to remove algae from pool walls and bottom. Black algae must be brushed vigorously before and after application for best results. After applying, continuously operate pool pump for 24-48 hours. In cases of persistent algae repeat brushing and product application after 3-4 days. Once pool is clear, clean the filter with a filter cleaning solution.
Algae Prevention
For treatment of freshly filled, cleaned, or restored pools, add 16 fluid ounces of this product per 10,000 gallons of water directly into the pool. Maintenance additions of 4 fluid ounces of this product per 10,000 gallons of water must be made every 7 days after initial treatment. Additional applications may be needed after heavy rains. Brushing pool surfaces weekly will greatly reduce the chances of pool algae appearing.