We used Chlor-Floc in the Air- Force
Posted by: rikjohnson on Feb-25-13 11:17 AM (EST)
The water was still murky but safe.
I admit to being overly cautious and pre-filtering through coffee filters before I stick my pre-filter hose into that water.
Once the river was so bad I paddled into the middle of the lake to find water that I felt was clear enough to filter.