The Bestway Clearwater Swimming Pool Starter Kit will quickly transform your grimy pool into a clean and healthy swimming environment. Even the worst looking (and smelling!) pools will sparkle again thanks to the special chemicals contained in the kit. A 500g container of rapid-dissolving chlorine granules will produce free active chlorine (FAC), which disinfects pool water, eliminates bacteria and kills harmful organisms. There's also a 500ml bottle of Algaecide - this prevents algae building up and promotes clearer, cleaner and healthier water. You also get 25 swimming pool Test Strips to let you easily check the alkalinity, chlorine and pH levels, ensuring they're suitable for swimming (pH levels should be between 7.2 and 7.6). Helping you maintain a consistent pH balance ia a 500g container of pH Plus and a 700g container of pH minus - these can decrease or increase pH levels. Bestway have included a Pool Treatment Guide (as with all chemical products, instructions and warnings should be followed extremely carefully). Depth: 14 CM Height: 20.5 CM Width: 16.5 CM Age Range: Child (9-12 years) Experience Level: Beginner Warning Message: Warning: Adult supervision at all times Great all-round starter kit for pool owners Contains essential chemicals for maintaining water Helps to keep water safe & prevent algae Includes chlorine granules, pH plus & pH minus, test strips & more