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estinamir
Nov. 11, 2020
12:18 p.m. PST
Why not lifestraw
This simple filter called lifestraw last for 1 year and costs around $20. It can even make pool water drinkable.
https://www.youtube.com/watch?v=as0tZxByp5A
https://www.youtube.com/watch?v=LikhvralK9I
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Harry Sangree
moderator
Nov. 11, 2020
12:25 p.m. PST
This sounds promising. Please go to the challenge homepage, register as a solver, and submit your solution.
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