Top 3 Anti-algae multi-action MAREVA - 5 L - 150039U, its triple action reduces the consumption of other products and extends the range of effectiveness of chlorine. It activates, reinforces and prolongs the disinfecting action of chlorine, prevents the formation of algae, flocculates organic matter and prevents limescale deposits. An indispensable product for beautiful and healthy water. Marva specializes in the manufacture and design of treatment products and equipment for in-ground pools, above-ground and self-supporting pools or public pools. Today, it is one of the European leaders in pool treatment products and the second largest producer of P.H.M.B (PolyHexaMethyleneBiguanide) which is a chlorine-free disinfectant. Advantages: Reinforces and prolongs the disinfecting action of chlorine Prevents the formation of algae Flocculates organic matter brought in by bathers or the weather, which is then stopped on the filter Prevents lime deposits and rust stains from forming The TOP 3 formula is patented Characteristics: Action: anti-algae Composition: algicides, polymerized ammonium chloride, copper sulphate and other active ingredients Capacity: 5 L Shelf life: 3 years Directions for use: Routine treatment: Pour in front of the discharge (filtration in progress), every week, on a fixed day (Saturday for example) 0.10 L per 10 m3 of water Curative anti-algae action: 0.5 L per 10 m3 of water preferably after a shock treatment with REVATOP (1 litre per 10 m3). Caution: Space the two treatments 1 to 2 days apart. Incompatible with PHMB-based treatments (Revacil + type) Packaging : One MAREVA Top 3 Multi-Action Anti-algae - 5 L - 150039ULivred in its original packaging