Dropsy in Fish: Causes, Symptoms & Treatment


Goldfish with dropsy or swollen scales and bellies

Dropsy is a bacterial infection that can leave them bloated and hinder their ability to swim. If left untreated, it can be deadly. The condition is brought on when bacteria clog the fish’s kidneys, causing an accumulation of fluid in the body cavity.

Causes Of Dropsy

While it’s unclear what causes Dropsy, it can be prompted by a viral or bacterial infection. Additionally, fish under stress or malnourished may be more prone to the condition.

Symptoms Of Dropsy

Dropsy affects saltwater and freshwater fish but is more prevalent in saltwater aquariums. Like other illnesses that cause bloating, symptoms include puffiness around the eyes and scales that protrude from the distended regions because they can’t lie flat against the body.

Sluggishness, less appetite, and changes in gill coloration are other symptoms.

How To Treat Dropsy 

Dropsy can be hard to manage if not detected early on because fluid accumulation in the body cavity at that point may already have resulted in organ damage.

If you believe your fish has Dropsy, alert the seller where you purchased it and cross your fingers. Furthermore, some pet stores may offer advice on how to manage Dropsy at home.

To Treat A Fish With Dropsy At Home

While medications do not always succeed in curing Dropsy in fish, if you choose to attempt medication, you will need to treat the water with copper or Formalin.

Isolating the fish in a separate quarantine tank is the best choice since it will protect other fish from contracting Dropsy and enable you to monitor the condition of your sick fish without worrying about infecting others.

However, if you use a quarantine tank, the fish must be relocated to a different tank with fresh water when it starts to recover.

In situations where treatment at home or in a pet store is not possible, euthanasia may be the only alternative. If you decide to euthanize a fish with Dropsy, return it to its original tank so that it does not have to go through the trauma of being relocated.

Prevention Of Dropsy

Dropsy is a disease that cannot always be prevented, but there are measures you can take to decrease the chances of encountering it:

  • Offer your fish a balanced and nutritious diet, and be careful not to overfeed them, as this can lead to stress on their organs.
  • Regularly change the water in your aquarium to avoid the buildup of infections.
  • Do not overcrowd your aquarium, as this can cause stress for all fish, which could increase their likelihood of becoming sick or contracting a disease.
  • Avoid abrupt temperature and pH level changes, as they can weaken your fish’s immune system.

Observing your fish staying at the bottom of the tank may signal that something is not right. Detecting these early indications can help prevent Dropsy and other diseases from harming your aquarium.

Make sure everyone in your household knows what should and should not be disposed of down the drain. For instance, if you have a sick fish and need to dispose of it, do not flush it down the toilet or place it in the sink disposal. Instead, take it outside or put the fish in a container with water and ice, then take it to your local pet store.

If you have other aquariums, it is wise to quarantine new fish for at least two weeks before introducing them to your main tank. This will give you time to watch for any signs of illness in the new fish.

Can A Fish Recover From Dropsy?

Regrettably, Dropsy is a disease that is not always treatable, and euthanasia may be the only solution. However, there are cases where a fish will recover from this disease if treated promptly and with care (i.e., feeding them nutritious foods that help support organ health).

Can Dropsy Spread To Other Fish?

Dropsy can be contagious, but it does not spread through the water. If your fish develops Dropsy, remove it from the tank as soon as possible to prevent other fish from contracting the disease.

Fishkeepingfans

We are Frederik and Felix, brothers and passionate fishkeepers who have dedicated their lives to the pet industry. We are trusted experts in this field thanks to years of experience as the owners of a high-end pet shop that specializes in aquariums and terrariums. We are certified in aqua animal care, aquarium maintenance, fish health, and terrarium maintenance. We started this blog because we love sharing our knowledge with other fishkeeping enthusiasts. All of our content is well researched and based upon scientific evidence from reliable sources like the American Association of Fish Veterinarians or the Aquatic Animal Life Support Operators. We strive to provide accurate and reliable information for our readers and are available to answer any questions. We hope that you find our blog interesting and we look forward sharing our passion with yours!

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