Livebearer problem

Hi
I've talked to some other people about this and they have had the same
happen. Originally it just affected my fancy guppies(I gave up on them,
just have feeders in with the crayfish now, hard to tell if they experience
the same problem as they are living up to the millions fish name and the
crayfish or chinese algae eaters would eat anything they could find), but
recently the platies are showing the same. What happens is that the fish
eat well and look well and then I'll notice one getting thinner and thinner
until they die or I euthanise(sp?) them. I have checked my water quality
and the Ammonia and Nitrite are both reading 0. I know our water is
hard(about 8), but I don't think that is the problem. We do have a water
softner on our well. The other fish in the tank are not affected. I
thought the Red-Tailed shark or chinese algae-eaters may of been the problem
and they were moved into the crayfish tank, but no difference. So according
to the test kit and the other fish the water is fine, but I have fish that
just waste away. I was looking for any ideas as what it could be and flukes
have come up, but if there are any other ideas they would be much
appreciated.

--
JHudson
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