Guess what? There are, and salt resistant ones, too.
Mousey, one thing you could try if it turns out that nothing else works is to get several containers and move the fish between them daily. As the breeders drop off each day, the fish will be gone before the swarmers hatch. Keep doing that for a couple of weeks and your fish will be close to spotless without any meds at all.
heh,heh.. see why they invented meds? The other way is too labor intensive. However, it has it's uses in cases where you want to keep your fish med-free or when meds don't work.
I'd keep trying other methods first, though.
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