blackness visible internally

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ghettorigged

Aquarium Advice Regular
Joined
Apr 15, 2003
Messages
74
Location
catskills, ny
My fish are turning dark colors internally.
It starts near the organs and seems to spread down the spine until they die.
The second symptom is that on the center of the breast, a bump appears and also turns dark in the center.
Third symtom soon before death is scales turning out and lack of swimming.

What is it? What can I do? I see the signs starting with a few fish now and have lost one.

It's a 44 gallon planted FW tank with about 25 fish. 2 angels, 2 ottos, and the rest are schools of tetras (neons, flames, bloodfins, lemons).

:?:

Thanks!
 
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