Fast and Clear

By BarryP Ranked #509 - Trail Running Hydration January 20, 2010

How do you know if a filter is cracked? You can’t. The First Need cartridge is the only one that passes the blue-dye test (instructions included). I’ve tried this test on several ceramic and other carbon filters and they let the blue through. Thus you can’t tell if the competitor’s filters are broke. What this means is--- with a dirty lake, the First Need will give you clear water. The other filters give you an interesting color of water (ask me how I know). The other filters may be filtering, but psychologically I cannot drink their color-tainted water though it may be OK. I’ve even filtered sticky grape soda with the First Need and it came out clear! Other things I appreciate:
1. independent virus test report
2. all one-piece; nothing to assemble!
3. fast pump speed (1L/40sec).
4. no batteries to worry about
5. And I’ll say it again: dirty water comes out clear.
I dislike the 15oz but I’ll live with that for its speed and accuracy.

View Details: First Need XL Water Purifier Replacement Cartridge

Helpful Votes: 1 Yes