Red spot disease is also known as Epizootic Ulcerative Syndrome (EUS) or Mycotic Granulomatosis (MG). It is an epizootic condition that does not frequently amongst freshwater fishes (it is seasonal).
Symptoms Of Discus Red Spot Disease
Epizootic Ulcerative Syndrome (EUS) or red spot disease has the following symptoms;
- Red spots on fins.
- Loss of appetite.
- Decrease in activity (less swimming).
- Gills might be swollen.
- Gills might be reddish.
Disease Description & Causes (EUS) Red Spots
Red Spot disease (EUS) is a fungal disease that is composed of fungi such as Aphanomyces invadans, A. piscicida, A. invaderis, and ERA (EUS-related Aphanomyces).
Some of the outbreaks of EUS have been connected with rhabdoviruses; it has also been found that Gram-negative bacteria usually infect lesions caused by EUS.
Discus Red Spots Disease Causes
 – Epizootic Ulcerative Syndrome is a condition that is usually common this is a situation that could come about when the water temperature is very low (long cold season) like say between 18o C and 22o C.
 – The spread of EUS is mostly done through water supply and the discus fishes that are vulnerable to its attack are puerile discus including the young adult discus.
Treatment For Red Spot Disease In Discus
EUS cannot be controlled while in water. However, if there is an outbreak in an aquarium or tank;
- Add lime to the tank water to help improve the quality of the water
- Remove the fishes that have been infected. By so doing, you reduce the rate of mortality
Overall, the way to treat EUS is to:
- Pour 1/8 teaspoon of Potassium Permanganate per 4 gallons of water and dip discus in it.
- Change tank water and pour in Acriflavine and tetracycline before placing the Discus back into the tank water.
Discus Red Spots Future Prevention Tips
If you want to prevent red spots in discus fishes do the following;
- Remove dead fishes in the tank in order to avoid the spread of the disease. This is to prevent the fishes that survive from pecking on the fish that has been infected.
- Feed the proper diet to Discus
- Quarantine new fishes you want to add to the tank for about 3 wks. before you add them to the tank to make sure that proper hygiene is maintained.
- Maintain a good quality of tank water.
- Avoid overcrowding in the tank.
Red spot diseases are very deadly. They can kill discus and every other fish in the tank once they become infected. It is best to keep your tank and tank water clean to avoid contamination rather than trying to treat the fishes when they become infected.