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 http://www.polarpurewater.com/instructions/
http://amzn.to/2lqBSsY Polar Pure Iodine Water Filter Purifier Sterilizes 2,000 Quarts
Katadyn Hiker Pro Microfilter http://amzn.to/2m2FMF9
http://amzn.to/2lSCWGW Vipe Digital LCD Aquarium Thermometer Fish Tank Water Terrarium Temperature