Sterilizing Newly Acquired Plants
You must always sterilize your
newly acquired plants before putting them in your koi pond.
This is because adding new plants to your koi pond always poses the
risk of introducing parasites to your koi pond.
Since you can never be sure if
the new plants you bought from the store or given to you by a friend
is not infested by parasites, it would be more prudent on your part
to just sterilize the plants before exposing your koi to them.
Sterilizing plants is not as
difficult as many people think. You just need a container to
hold the sterilizing solution in. The holding tank that you
use for your sick koi is a good choice for this purpose,
assuming that there's no koi recuperating in it of course. At
any rate, any clean container will do.
Put 20 gallons of water in your
clean container. Add 5 drops of formalin to the water.
This will be your sterilizing solution. Immerse your new
plants in this solution for 5 to 6 hours. This should kill the
parasites, snails, and fish eggs that might be attached to the
plants when you acquired them.
Make sure that the plants are
totally immersed in this solution. Parts of the plants that
are sticking out of the water will not be sterilized, so the purpose
of the whole exercise will be defeated if this happens.
After this immersion process,
take the plants out of the formalin bath and rinse them very
thoroughly in running water for several minutes. Remember that
formalin is very poisonous to fishes, so there must be no traces of
it when you finally add your new plants to your koi pond.