Neon Tetra disease is caused by a parasitic organism known as Pleistophora Hyphessobryconis that feeds on the host fish until the fish is dead. This is a communicable disease that is caused when fish eat other dead fish or even from eating live food servings such as those from Tubifex. Live food can act as a carrier of the disease and also transmit it to your fish once they eat it.
The parasitic organisms enter the fish and invade the stomach and the digestive track and consume the fish from the inside out. There are a few different key signs and symptoms that will appear if your fish are suffering from Neon Tetra disease which will be discussed in the following section. The unfortunate part is that there is no real cure for the disease, and more so, fish aren’t the brightest creatures and they will eat other dead fish when given the chance.