5 ms·
Because once, when I did that, the water turned black within a matter of hours for unknown reasons.
by user982 7y ago
Because once, when I did that, the water turned black within a matter of hours for unknown reasons.
- my_username_is_ 7y agoIn a glass or steel bottle?
- user982 7y agoGlass, refilled with initially clear water from a public drinking fountain.
- ac29 7y agoA quick web search says that may have been due to manganese in the water, which turns black when it oxidizes.