BioGuard Easy Shock and Swim is a tried and true multi-purpose shock, which provides oxidation, clarification, buffering, and flocculation in one easy-to-use product. This product is an excellent choice for all pools, especially above ground models. It is suitable for use with Nature 2 and Frog pool systems. With this product, you can treat and swim in as little as 15 minutes. Easy Shock & Swim will not affect pH levels and there is no premixing required. Product Dosage Routine Maintenance: 1 lb per 12,000 gallons of water per week. Additional Application: 1 lb per 12,000 gallons of water as needed. Off Season Maintenance: 1 lb per 12,000 gallons of water per month. Directions With the pump in operation, apply the entire dosage at one time. Broadcast evenly around edges with special attention to areas of the pool where water circulation is the poorest. Apply directly to pool water only. Do not add through skimmer or any automatic dispensing device. For best results, test and adjust pH to 7.2-7.6 prior to application. Apply product when pool is not in use. Swimming may resume in as soon as 15 minutes after product application. Test chlorine residual. Swimming may resume when chlorine residual is 1-4 ppm. Ingredients Sodium dichloro-s-triazinetrione: 58.2%, Other Ingredients: 41.8%