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It's 0.9% by mass. You can buy it easily in large bottles so you don't need to learn to disinfect and filter your water correctly.



Boiling is enough, saltwater sold in pharmacies is $5 a bottle where I am, a rip off. Not that I can't afford $5, but I don't like to be a sucker.


At least filter it. And I'm not sure boiling is enough, that will depend on what is in it.




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