A: It
will take only a few instant for chlorine to be removed. However,
you have to take into consideration a few other important
parameters. One will be the temperature of your water. Since you
should only use the cold water faucet (hot water comes from water
heaters and oftentimes water heaters corrode and water is heavy in dissolved
harmful metals), then usually when you fill a tank the water is
initially very cold. Once you plug your heater in it will take
usually a couple of days for water temperature to reach safe range.
As a rule, the bigger the tank, the longer you have to wait. Another
parameter yet is the cycling of the tank. I personally do not worry
about it and have never had a problem. Then again I never crowd my
tanks and I use super heavy duty power filters with bio wheels. In
short, if you have say a 2 gal tank you just set up with water that
you treated that day and that is already at the same temperature as
your betta's current water, you could move him to such a tank within
1 hour. If setting up a larger tank with cold water, I would wait
about 3 days (a new heater will have to also be adjusted to heat the
water to the right temperature, so with a new heater there is a
chance for mistakes (water too hot) and you need a few days to
figure it out and dial it in). I hope this answers your question and
helps you.
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