![How To Make A 4 Gram Pre Filter For Backpacking Water Filtration](https://www.waterfilteradvisor.com/wp-content/uploads/2021/10/How-To-Make-A-4-Gram-Pre-Filter-For-Backpacking-1150x720.jpg)
How To Make A 4 Gram Pre Filter For Backpacking Water Filtration
How to make a lightweight pre filter for removing larger particles in water before treating it when hiking. This is made from a gatorade cap and weighs only 4 grams.
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