Columbian Tetra tail growth.. please help

[hjmfish1013]

Hi everyone, I am posting because recently one of my Columbian Tetras has developed some type of growth on its tail. It looks pinkish red and the rest of the tail has lost its red color. A couple weeks before I had noticed the fish's belly was exceptionally large, but I passed it off as pregnancy because I saw no pine-coning of the scales. Please help me identify and fix the problem with the fish. I will post the image below.

 

[V227]

Might be an injury with a fungus attached to dead tissue or it might be Lymphocystis; a non-fatal virus. Difficult to determine from a pic.
Clean water and time will cure a minor fungus. It might help to use Melafix.
Nothing can be done for a viral growth.

 

[hjmfish1013]

Thanks for your response, I'll look into Melafix.