Dosage and method of use: Initial treatment: 2 litres of product per 100 m3 of water Maintenance treatment: add 0.5 L of product per 100 m3 of water once a week. These dosages are for guidance only and may be modified according to the specific characteristics of each pool DANGER INDICATIONS: Very toxic to aquatic organisms, with long-lasting effects. Keep out of reach of children. Read label before use. Do not disperse in the environment. contains: poly-hydroxyethylene-methylene-dichloride