Leisure Time Replenish combines the power of a clarifier, buffer, oxidizer, and shock into one great product, vastly simplifying spa maintenance. Its quick-dissolving granular formula can be added directly to your spa water without pre-dissolving to make application easy, and utilizes DuPont's Oxone to avoid adding any chlorine to your pool. Best of all, Replenish is made by Leisure Time, an industry leader in the spa industry for years, allowing you to buy with confidence.