GLB SuperSonic 73% Cal-Hypo Shock

Description GLB SuperSonic is a highly effective multi-purpose product that sanitizes, clarifies, prevents algae and shock treats your pool. It is convenient, easy to use and won't over stabilize your pool water. The fast-acting formula can be used on all pool surfaces, does not contain cyanuric acid and leaves no residue. Dosage 9 - 18 oz per 10,000 gallons of water every week. Directions Shock Treatment: Every 7 days, or as necessary to prevent pool problems, shock treat/super chlorinate the pool by adding 9 to 18 ounces of this product per 10,000 gallons of water to provide 5 to 10 ppm available chlorine. Additional shock treatments may be required to correct problems which are caused by visible algae, high bathing loads, heavy wind and rainstorms. Additional shock treatments may also be required to correct problems such as unpleasant odors and eye irritation. Check the available chlorine with a suitable test kit.