Betta Fish Cotton Wool Disease

Cotton wool disease, or Columnaris as the experts would say, is not the type of infection you would think it is. From first seeing it you might think it is a fungal infection due to the fact that it resembles mold. However, it is actually a bacterial infection that can affect both external and internal areas of the fish.

So what cause this disease and how can you fix it?? Click here for the full scoop on cotton wool disease: Betta Columnaris