Water Tablets That Work When the Filter Freezes. Five Treatments Ranked by Cost Per Liter.
Every squeeze-filter owner learns the same lesson the hard way, usually on the first cold night of the season: hollow-fiber filters and freezing water do not mix. One night at 25 degrees and the microscopic fibers inside your Sawyer or Katadyn BeFree can crack — invisibly, silently, with zero signs of damage. The filter still … Read more