Used for a party of 7 in Boundary Waters Canoe Wilderness Area. Water there is tea colored with suspended matter. We found we needed to clean the filter more than once a day with the amount of water we were filtering for our party. Still, a pump would have had the same problems and a simple back flow might not have been so effective. On arriving home, a soak in cholox and extra back flowing re
This review was written in the old system and had content requirements that are different than reviews written today.