These high strength, non-stabilised chlorine granules are great for shock dosing your pool. The ideal amount needed will reflect the amount of usage on the pool, however used once a week can help break down debris & kill algae in the water. Another added benefit is the ability to destroy swimmers waste that can build up inside a pool. Please ensure that the pump on the pool is turned on preferably near the water inlet to aid a fair distribution of the product. These granules are designed to rapidly dissolve in the water.Â