Chloramine is produced
when a water treatment plant injects both chlorine and ammonia
simultaneously into the water supply.
This is done to reduce
the free chlorine's ability to combine
with organic matter in the water and thereby produce potentially
harmful trihalomethanes, or THMs.
Because chloramine has
less disinfecting ability than free chlorine,
a higher concentration of chlorine is usually used to get the same
bacteria kill rate.
Chloramine Toxic to fish
Chloramine is very toxic to fish.
Chloramine, unlike chlorine, passes through the gill tissue causing
Chloramine then enters the bloodstream and binds to iron in the hemoglobin
in the red blood cells.
The blood is unable to carry oxygen and the fish become
tired, inactive and sits on the bottom or gasping near the surface.
of Shower filters are claiming that they remove chloramines
and leads and heavy metals because they use carbon or carbon and KDF
While KDF may have some ability to remove these contaminants
however in the small amount of filtering media and the rapid
flow rate of a shower filter, this is unlikely.
If you are using this kind of shower filter, you should
not assume it will be safe to add water directly from it
to your aquarium. However, using these media in your
aquarium filter can filter away chloramin because the water
is repeatedly passed through the filter unlike the "one-pass"
of the shower filter.
If you are unsure about the chloramine content in
you can call your water supplier for this information.
If your water contains chloramine, treat
the water before you add
it to your aquarium because it can damage your biological filter
by killing off beneficial bacteria in a cycled