chlorine will evaporate if the water is left sitting open, but chloramines and heavy metals won't. chloramines are being used more and more in drinking water. i have a filter on my faucet, and i run the water through that while filling something, then i use dechlor and let it sit open for 24 hours before using it for my fish or my hermit crabs.
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Concealed by nights icy cloak
Through the brambles, not a sound
Whisper like a shade to choke
With blades of venom, to the ground
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