| Jnorth makes a good point here. However, we need to keep in mind that you can't use any salt with straight formalin as it can burn the fish. Proform C is another one we recomend for costia. He can try the salt meanwhile, or a salt dip/bath. But the salt would have to be totally removed to treat with formalin, and a limit of 0.1% with proform C, and Proform C also needs applied at night due to the fact that light can deactivate the mg.
How old is the book Steve? There's a new one out now in case you didn't know.
Still, it does not mean that flukes are not present, sometimes they don't show on a regular scrape, but a gill snip/scrape might show up gill flukes. It is possible to have more then one parasite involved.
Also keep in mind that the pond itself will need treated also for the costia.
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~Kathy |