Internal Fungus?

PumaWard

In loving memory of Meeko
Jul 23, 2003
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My brother just bought 6 guppies from the lfs, one has already died from something that looks like internal fungus in their tail muscles. Its under the scales and they have lost function on their tails due to it. It looks like the muscles have turned white and died. Two of his females are also infected with it.

They are in a planted 10 gallon tank with 3 pygmy cory cats.
Nitrites are around .2, ammonia is zero (there is salt in the tank though). gH is 12, pH is 7.6.

Any help is greatly appreciated.
 
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