Berling'o MAREVA disinfectant without chlorine for swimming pools from 2 to 4 m3 - 12 x 50mL - 100701U guarantees a triple action: disinfection of the water, prevention of algae, and prevention of limescale. Without chlorine, it is an odourless treatment, gentle to the eyes and skin, which makes it ideal for children's bathing and people with sensitive mucous membranes. Suitable for large above-ground pools with a volume of 9 to 15 m, i.e. for a round pool a diameter of 4.57 m and 5.20 x 3.30 m for a rectangular pool. It is ideal for above ground pools. Easy to use, you just have to pour it once a week to treat your pool. (12 Berling'o per box, i.e. a 12-week treatment) In addition, please note that it is recommended to use 5L of Revatop 12% every month to keep your water clean. This product is available in several packages, depending on the volume of your pond. Simply choose from the list according to the volume of water in your pool: 12 Berling'o 50 ml for pools with a volume of between 2 and 4 m, corresponding to a pool of 3.05 m or 3 x 2 m rectangular 12 Berling'o of 75 ml for pools with a volume of between 5 and 8 m, corresponding to a pool of 3,66 m or 4,50 x 2,20 m rectangular 12 Berling'o of 180 ml for pools with a volume of between 9 and 15 m, corresponds to a pool of 4,57 m or 5,20 x 3,30 m rectangular Advantages: Simple, effective and gentle method Disinfects + prevents algae + prevents limescale Ideal for above ground pools No unpleasant chlorine odours Respectful of your skin and your eyes Characteristics: Composition: Biguanide (phnB) For pools with a volume between 9 and 15 m, i.e. a pool with a diameter of 4.57 m (round) or 5.2 x 3.30 m (rectangular) 12 x 180 mL bottles Not compatible with oxidizing products such as chlorine. Frequency: 1 bottle per week Treatment for 12 weeks Instructions for use: Once a week, pour the contents of a Berling'O into the pool and run the filtration / cartridge purifier for 5 to 8 hours a day. Packaging : Berling'o MAREVA disinfectant without chlorine for swimming pools from 2 to 4 m3 - 12 x 50mL - 100701UL delivered in its original packaging