alt Hacker NewsIt'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.
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.