Lifesystems chlorine dioxide liquid for water purification 2x30ml product description chlorine dioxide droplets are a safe and effective method of disinfecting water they kill bacteria viruses and cysts in water including giardia and cryptosporidium the droplets have a quick reaction time and leave much less residual taste than ordinary chlorine treat up to 60 litres of water once water has been purified it should be kept in a sealed container this container should either be kept in