Article courtesy of Don Tai | January 28, 2013 | dontai.com | Shared as educational material only
The combination of chlorine and ammonia, when added to water, creates chloramine, a toxic agent to fish. Although chlorine evaporates out of the water after 24 hours, chloramine will not, protecting water from bacteria but often killing fish. A water conditioner will solve the problem of a fish kill. This combination of chlorine and ammonia into chloramine often occurs between household ammonia and chlorine bleach. By themselves, chloramines can attack mucous membranes in the lungs, and in the presence of organic matter, can produce trihalomethanes, possible carcinogenic agents. Read more about it here: http://dontai.com/wp/2013/01/28/goldfish-and-toronto-water-chlorine-and-chloramines/.