Black skirt tetra with white spot on tail??

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janice_016

Aquarium Advice Regular
Joined
Sep 1, 2010
Messages
72
37 gallon tank
7.0 PH
0 ammonia
0 nitrites
Temp is 24
Variety of tetras, platys and guppies. Not over stocked. 3 years old

Just got one new black skirt tetra today and I noticed it has a small white almost fuzzy dot on it's tail or bottom fin. Seems healthy so far. How do I tell if this is bacterial and can mess up my entire tank. Or just a fungus that may go away or need to be treated? Is it from being nipped at?

ImageUploadedByAquarium Advice1409520989.362097.jpg


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