>>2554636gravity filter kit things are a meme
>What do you use for big groups?everyone should have their own way to purify water.
one extra communal gravity setup going to make life easy at base camp.
the idea of being the "water boy" for a group is fucking dumb. what if someone gets lost or separated? what if you fall off a cliff with the only water filtration gear? common sense = why nobody does this stupid shit.
>Are UV-C purifiers enoughwhat are you a fag?
just run it through a sawyer, if its really nasty put a tab in it or boil it for a while.