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You can kill most invertebrates with the right dosage of formaldehyde (37%).
I use one to 3 drops per gallon, every other day for three times, for hydra.
That dosage doesn't seem to kill fish, plants or snails. Do a good water
change afterwards and vacuum out as much mulm as possible.
It is safer than copper, and breaks down in the tank (binds to mulm) so
removal isn't any problem.
You may need to experiment to see how much it takes to kill your
BTW, planaria don't bother fish, but they can gather and eat a *lot* more
eggs than you can, so are a really bad idea in almost any hatchery
Invisiblecat13 at aol_com wrote:
> They may just be planaria, but how
> do i get rid of them anyway? There
> are no fish in the tank at all. Luckily
> I wasn't ready to put them in yet when
> this happened. Ok i'm paranoid about
> my animals.
> Tony A Perry
> AKA 08297
> Deep Gap, NC
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