Chlorine, please note spelling error in question, is a chemical found in Swimming Pools used to stop harmful germs attacking other swimmers.
clohrine, a poisinous gas and sodium
Keep clohrine levels at constant
AnswerThere are generally two types of aquariums: Fresh water and salt water. The most common tropical fish available for a home aquarium thrive in fresh water. For fresh water aquariums, people usually use tap water, but treat it first with commercially availble water treatments to remove harmful properties, such as chlorination (chlorine present in tap water will kill good bacteria that the fish will need to survive), and to obtain a pH balance that will be agreable with the fish. You can get a simple bottled chemical treatments at most any pet store.I recommend following the link below to learn more about water for aquariums.http://faq.thekrib.com/begin.htmlAnswerSome are concerned about using filtered water (RODI) as it takes out the chemicals the fish needs. This is not an issue in saltwater aquariums as the salt mix will add the needed chemicals. This may cause problems in freshwater tanks, however preparations are available to add the missing chemicals in filtered water. RODI water is a must in Reef tanks - it saves problems down the track.