GLB SuperSonic is a highly effective multipurpose 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 and leaves no residue. Compatible With Chlorine and salt water Dosage Start Up: 9-18 ounces per 10,000 gallons Maintenance: 9-18 ounces per 10,000 gallons every 7 days or as necessary Manufacturer GLB Manufacturer Part # 71442A Pool Chemical Type Shock | Oxidizer Product Features * 73% cal hypo granular * Fast dissolving, multi-purpose formula * Sanitizes, clarifies, prevents algae and shock treats pool water * Will not cause over-stabilization