Russell W.wrote a review of Katadyn Guide Pro Water Filter Replacement Cartridge on April 29, 2009
Have used this filter with our Venture Crew (10 - 12 people) on 2 multiday hikes. Just returned from the first 20 miles of the A.T. in Georgia. This filter is great. It is quick, pumps lots of good clean water, and has filled everyone's nalgenes and camelbaks repeatedly. Great product!