Chlorine Dioxide Tablets by Life Systems are the safest and most effective chemical disinfectant tablets for water. They help kill bacteria, viruses, and cysts in water, including Giardia and Cryptosporidium, making them essential for remote travelers. Chlorine Dioxide is a widely used water disinfectant that kills most viruses, bacteria, and cysts in water and has little or no after-taste. Unlike Chlorine, it leaves no noticeable after-taste. This pack treats up to 30 liters of water. Recommended by Duke Of Edinburgh Awards. Weight: 40g. Volume: Treats up to 30 litres of water (pack of 30 tablets). Dimensions: 65 x 105 x 20 mm.