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by callmeal 120 days ago
It's the "salt" used in water softeners. Necessary when you have "hard" water.

See: https://en.wikipedia.org/wiki/Dishwasher_salt
1 comments
ortusdux 117 days ago
It's common in the US to have a whole house water-softener. Is this less common in the UK?
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fredley 117 days ago
Brit here: It is very uncommon.
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