This MAREVA Reva winter multi-action product - 5 L - 150015U, is multifunctional: concentrated hyperactive anti-algae, anti-limescale and anti-bacteria. Compatible with all treatments, it is guaranteed without copper sulfate. This product should be used during winter, when the pool water temperature is below 16C; in spring, you can then resume regular maintenance treatment. The water will be crystal clear in the summer! MAREVA specializes in the manufacture and design of treatment products and equipment for in-ground pools, above-ground pools, self-supporting pools and 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 : With its hyperactive and anti-limescale concentrate, it prevents scale deposits, algae and bacteria development Anti-limescale and metal sequestering to prevent rust stains that appear in winter Protects water during winter Better for the environment and your health: guaranteed without copper sulfate Compatible with all other treatments Large quantity (5 L) for intensive use High concentration of active ingredient Features: Use: when the water temperature is below 16C Dosage: 0.5 to 0.7 liters of multi-active winterization per 10 m of water to be protected. Chemical substance: PHMB Compatible with all other treatments Composition: Polymerized quaternary ammonium chloride Quantity: 5 L Shelf life: 3 years Composition: Polymerized quaternary ammonium chloride Ref. 150015U Directions for use: Clean the filter (annual cleaning of the filter is essential to avoid the creation of an algae nest, scaling or the creation of a privileged passage that would damage it and make it ineffective) Clean the water line with a suitable product (use a shock treatment if necessary) as well as the skimmer baskets, the pump pre-filter, the back of the projectors and the inside of their niche Check the pH and adjust it if necessary Sweep the pool and pour the winterizing product that will take care of your pool all winter long (sweeping the pool can be done manually or automatically depending on the model of broom you have chosen) Pour multi-active wintering directly into the pool in front of the outlets and let the filtration run for two hours (available in 1 L container) Dosage: Use 0.5 to 0.7 liter of multi-active wintering per 10 m of water to protect. Pools of 0 to 20 m: 1 liter of multi-active wintering product Pools from 20 to 35 m: 2 liters of multi-active winterization product Pools from 35 to 50 m: 3 liters of multi-active winterizing product Pools from 50 to 70 m: 4 liters of multi-active winterizing product Pools from 70 to 90 m: 5 liters of multi-active winterizing product Pools from 90 to 120 m: 7.5 liters of multi-active winterization product Pools from 120 to 150 m: 10 liters of multi-active wintering product Packaging : A MAREVA Reva multi-action wintering product - 5 L - 150015UL delivered in its original packaging