This is Pool buddy. The only product that prevents the formation of a slippery layer in the pool. This patented water care product, in combination with chlorine, is guaranteed to keep the pool 100% clean and safe. Pool buddy also ensures that the chlorine lasts longer, which not only protects the environment but also prevents that well-known pungent chlorine smell. This also ensures less irritation of mucous membranes and respiratory tract. 1 sachet per week per 2,000 liters is sufficient. Features: Prevents a slippery layer in the pool Extends the lifespan of the chlorine 100% clean and safe Specifications: Color: white Packaging material: plastic Dimensions: 8.5 x 13.5 x 0.5 cm (LXBXH) Supplied per sachet