While this obviously won't be true for everyone, it's possible for some lucky folk to pick up nitrifiers from shed nitrifiers in chloralamine treated tap water.

Posted by BioConversantFan

1 Comment

  1. FishAvengerAvenger on

    This is probably the source of nitrifying bacteria when you setup a tank for the first time, fill it with tap water, and cycle it. Even without chloraminated tap water, there’s still some nitrifying bacteria.

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