How many iodine tablets are recommended for purifying a canteen of cloudy water?

The recommendation for purifying a canteen of cloudy water is to use two iodine tablets. This is based on the understanding that cloudy water can contain more particulate matter and potential pathogens, requiring a higher dosage for effective disinfection. One tablet is typically recommended for clear water, as the clarity of the water affects how well the iodine can disperse and kill bacteria or viruses. In cloudy water, the presence of sediments and organic materials can shield microorganisms from the iodine, necessitating the additional tablet to ensure adequate disinfection. Thus, using two tablets helps to ensure the water is treated properly and made safe for consumption.