How To Treat Discus Plague?

Publicado por Son Nguyen en

As we can see discus fish are known for their vibrant colors and unique, round shape, making them a popular choice for aquarium enthusiasts. However, like any other pet, discus fish are susceptible to various diseases. One of the most common and severe illnesses that can affect these beautiful creatures is the discus plague. This disease is caused by a bacteria infection and can be fatal if not treated promptly and effectively. In this blog post, we will discuss how to identify, prevent, and treat discus plague.
Many Newbie in keeping discus can not identify any sign when discus fish get an issue. So today we will get into the definition of discus Plague.
What is Discus Plague?

Discus plague is a term used to describe a severe bacterial infection that affects discus fish. This disease is often characterized by rapid onset and progression, with affected fish showing signs of lethargy, loss of appetite, color fading, and rapid breathing. If left untreated, the discus plague can lead to high mortality rates within your aquarium.

The bacteria responsible for this disease are usually present in most aquariums but only cause problems when the fish's immune system is compromised due to stress or poor water conditions. Cross contamination from an infected tank or equipment can also lead to an outbreak of this disease.

Identifying Discus Fish Bacteria Infection

Early detection of discus plague is crucial as it significantly increases the chances of successful treatment. The first signs of a bacteria infection in your discus fish may include behavioral changes such as reduced activity levels or loss of appetite.

Physical symptoms may include color fading or darkening, clamped fins (fins held close to the body), rapid breathing or gasping at the surface for air. In advanced stages of the disease, you may notice ulcers or sores on the body of your fish.

Preventing Discus Plague

Prevention is always better than cure when it comes to dealing with diseases like discus plague. Here are some preventive measures you can take:

1. Maintain Good Water Quality: Regular water changes and monitoring of water parameters such as pH, ammonia, nitrite, and nitrate levels can help keep your discus fish healthy and stress-free.

2. Quarantine New Fish: Always quarantine new fish before adding them to your main tank to prevent the introduction of diseases.

3. Avoid Cross Contamination: Use separate nets, siphons, and other equipment for each tank to prevent cross contamination.

4. Feed a Balanced Diet: A balanced diet can boost your fish's immune system, making them less susceptible to diseases.

How To Treat Discus Plague ?

If you suspect that your discus fish are suffering from a bacteria infection, it is crucial to act quickly. Here are some steps you can take and this is what we have been done to cure this issue:

1. Isolate Infected Fish: Remove the affected fish and place them in a separate quarantine tank. This will help prevent the spread of the disease to other fish in your main aquarium.

2. Antibiotic Treatment: Consult with a vet or an experienced aquarist for advice on the best antibiotics for treating discus plague. Commonly used antibiotics include kanamycin, metrodinazol (only active for 8hours after contact with water, 500mg/5-10 gallons water), tetracycline(work less for some type of bacteria and water look nasty, we don't use this much because less effective than other medication), japaniese tetra(soaking for 2 days. This is last step before move back to main tank) and salt(we use natural solar salt from homdepot, 1 table spoons/1-2 gallons). Remember keeping water at 84F, change all water every 24 hours or as soon as it look dirty before 24 hours and reapply medication. add an airstone to increase oxygen.

3. Supportive Care: Provide supportive care by maintaining optimal water conditions in the quarantine tank and feeding a high-quality diet.

4. Monitor Progress: Keep a close eye on the infected fish to monitor their progress. If there is no improvement after several days of treatment, consult with a vet or experienced aquarist for further advice.


Discus plague is a serious disease that can have devastating effects on your aquarium if not addressed promptly and effectively. By understanding what causes this bacteria infection, how to identify it, and how to treat it, you can increase the chances of saving your beloved discus fish from this deadly disease.

Remember that prevention is always better than cure; maintaining good water quality, avoiding cross contamination, quarantining new fish, and feeding a balanced diet can go a long way in keeping your discus fish healthy and disease-free.

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