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Koi Club of San Diego


Chloramine is a compound of chlorine and ammonia that is also added to tap water to control bacteria. It can also be formed by adding water containing free chlorine to a pond containing ammonia. If any ammonia is present in a pond, be sure and treat it before adding any tap water containing chlorine. To determine if Chloramine is in your tap water, fill a 5 gallon bucket with tap water, add the proper amount of chlorine neutralizer, and then test the water for ammonia using your ammonia test kit. Chloramine is present if a positive indication of ammonia is found. Chloramine is difficult to measure quantitatively in low concentrations, and particularly when a combination of chlorine and Chloramine is present.

Acceptable concentration 0

Chloramine does not decrease concentration nearly as fast as chlorine when exposed to air. It produces the same general effects as chlorine but is usually found in the lower concentrations that result in long term damage to the fish. The same treatment actions as for chlorine apply except that the ammonia remains after neutralization. A "healthy" bio-converter will take care of the ammonia or a chemical treatment may be used. Some commercial products incorporate treatment to both neutralize the chlorine and bind the ammonia components at the same time. Check the manufacturer's directions.