The JAVEL AQUA water treatment tablets contain 20 tablets in each package. Each tablet should be dissolved in 1 litre of water and left for 30 minutes before consumption. These tablets effectively eliminate microorganisms that can cause gastrointestinal disorders, making them perfect for outdoor activities and emergency situations where the origin of drinking water is unknown. These tablets contain NaDCC, an active ingredient recommended by WHO for ensuring drinking water quality. Be sure to read the instructions and packaging description before use. This product is considered as a biocidal product. For more details, please visit the manufacturer's website for Javel® AQUA.