So I have city water which of course has plenty of chlorine and chloramine. I am trying to make a shrimp tank which are very sensitive to water changes. I was to be able to fill a 5 gallon bucket and treat it with prime and seal it with a lid for when I have to use it. I only have a 10 gallon tank so water changes only get as big as 2 gallons so the 5 gallon tank will last a bit. Will sealing the bucket cause the chlorine to not be able to evaporate or once I treat it with prime and seal it it should be good for tank use for however long. Thanks for the help!