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Re: Hydra infestation
Henri Debruyn wrote:
> In an old DKG (german killieassociation)magazine I found a method that I
> started using and is very effective .
> add 6 milliliter to 100 liter tankwater of a 35% formaline solution .It will
> kill all hydra in 24 hours and then siphon the bottom to remove the dead
> hydra.There is no effect on fry fish or plants which cannot be said of
> medication sold in the aquarium industry.
> The same solution but 12 milliliter per 100 liter tankwater will kill all
> planaria but I use this dose only without fish in the tank as a safety
> Hydra will wipe out your fry and planaria will eat all the eggs.
> Henri De Bruyn <Bradenton FL
I have used the strong drug store (not LFS) formaldehyde ("Formalin" is a
trade name for it) like this for years. The dose can be reduced
substantially, and even planaria killed, if you do it every other day for
about three or four treatments.
It is readily absorbed by organics in the tank, hence gone in a few days.
IDK how my measure compares, but about 3 drops/G will wilt the hydra the
first day, make them drop off the third day (second dose) and an additional
dose or two finishes any stragglers. If that doesn't do it, because you have
a lot of mulm in tank or filter, try gradually increasing it until it does
I have eliminated planaria, this way, with no visible damage to plants or
fish. The continuous exposure, spread over several days is most effective if
you wish to use lower concentrations for the sake of fish, snails, etc.
Wright Huntley, Fremont CA, USA, 510 494-8679 wright at killi dot net
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