StandbySetting
Fish Aficionado
It's likely that your water contains Chloramine, Chloramine has the molecular formula NH[sub]2[/sub]Cl, When the Chloramine bond is broken you're left with a Chloride ion and NH[sub]2[/sub], free Hydrogen ions will then bond to the NH[sub]2[/sub] species creating ammonia, this could be why you're getting ammonia readings after water changes, coupled with the fact that your tap water may contain ammonia in the first place.







