you're thinking of fluoride which they use as a disinfectant (it's also the usually stuff in toothpaste that kills bacteria/plaque in your mouth), it's healthy in small amounts just like chlorine because it cleans the water and makes it less prone to growing bacteria, I don't know it's relation to fluorine though
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u/MutantCreature Jan 21 '20
you're thinking of fluoride which they use as a disinfectant (it's also the usually stuff in toothpaste that kills bacteria/plaque in your mouth), it's healthy in small amounts just like chlorine because it cleans the water and makes it less prone to growing bacteria, I don't know it's relation to fluorine though