Application only in clear water. Micropur Classic inactivates bacteria in water tanks and containers, keeping water free from germs, algae, and odors in an environmentally friendly way. Area of use: Drinking water treatment. Details: Preserves water using silver ions for up to 6 months. Requires 2 hours in clear water. Ideal for vacations and travel. Suitable for all water containers or tanks in boats and caravans. Use biocides safely. Always read the label and product information before use. Category: Water disinfection. Care product. Purpose: Cleaning. Contents / Delivery: Contains 100 tablets for 100 liters of water.