Iodine for water treatment

I am keeping this on hand as a backup.   Woops I guess it was the CDC. A Guide to Drinking Water Treatment and Sanitation for Backcountry & Travel Use The temperature listings Polar Pure Iodine Water Filter Purifier Sterilizes 2,000 Quarts Katadyn Hiker Pro Microfilter Vipe Digital LCD Aquarium Thermometer Fish Tank Water Terrarium Temperature