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Guppies Continue To Get Dropsy And Die : What To Do?

Guppies are one of the most popular freshwater fish for home aquariums. Their vibrant colors, active behaviors, and peaceful temperaments have made them a staple in the aquarium hobby for decades. However, the Guppies continue to get dropsy and die.

Guppies Continue To Get Dropsy And Die

As guppies continue to contract and succumb to dropsy, aquarists must arm themselves with the knowledge to fight back against this threat in their tanks.

What is Dropsy?

Dropsy is a symptom of an underlying disease rather than a specific illness itself. The name comes from the swollen, “dropsy” appearance that affected fish develop.

Most commonly, dropsy is caused by an internal bacterial infection, which results in fluid accumulation and bloating of the fish’s belly and eyes.

However, liver failure, parasites, or poor water conditions can also lead to dropsy symptoms.

Whatever the root cause, dropsy produces noticeable physical changes in guppies. Their scales will flare outwards from their bodies, resembling a pinecone, and their eyes may bulge.

Fluid buildup leads to bloating in the abdomen, giving guppies a falsely plump appearance. These swelling symptoms progress rapidly once dropsy sets in.

Dropsy is almost always fatal if untreated. The buildup of fluid puts pressure on the fish’s organs, particularly the kidneys, and death follows within days or weeks.

Unfortunately, by the time obvious dropsy swelling appears, the disease is often too advanced to cure. This makes prevention and early treatment essential.

Why Do Guppies Get Dropsy?

Guppies are genetically prone to developing dropsy, for reasons not fully understood.

Selective breeding to enhance color patterns seems to have made them more vulnerable to disease overall.

Their small size also puts them at higher risk than larger, more robust fish.

However, dropsy outbreaks frequently impact entire guppy populations, rather than isolated individuals.

This points to environmental factors under the aquarist’s control as major dropsy triggers. The main causes of dropsy in guppies include:

Poor Water Quality

Guppies need clean, fresh water to stay healthy. Ammonia and nitrite spikes from overfeeding or insufficient filtration quickly compromise their immune systems.

Dropsy-causing bacteria are opportunistic and can gain a foothold even in established tanks if water parameters slip. Performing regular maintenance and testing is essential.


Stress weakens guppies’ natural defenses against infection and disease. Excessive crowding, aggression from tankmates, poor diet, or improper water conditions induce stress.

Acclimating new guppies properly and providing a suitable habitat is key to limiting stress.

Introduction of Sick Fish

Quarantining new guppies before adding them to the main tank prevents introducing dropsy. The long incubation period means infected fish may not initially show symptoms.

Isolating and monitoring new additions for several weeks allows disease to manifest in quarantine instead of the community tank.

Underlying Health Issues

Guppies with compromised immune systems or preexisting conditions become more susceptible to dropsy.

Inbreeding depression, old age, parasites, or prior illnesses can all increase vulnerability. Focusing on overall health and vigor helps reduce risk.

Dropsy Warning Signs

Catching dropsy in its early stages is difficult but critical for survival. Subtle initial clues can indicate infection and swelling before it becomes externally visible. Warning signs to watch for include:

  • Loss of appetite
  • Lethargy
  • Discomfort or trouble swimming
  • Clamped fins held close to the body
  • Hiding or hovering near the bottom
  • Pale or darkened coloration
  • Ragged fins or tail

Rapid onset of these symptoms in otherwise healthy guppies should raise red flags. Isolate any suspect fish immediately for closer monitoring.

Look for a slightly distended belly or raised scales around the head and tail. These early hints of bloating signal dropsy even before the telltale pinecone appearance.

Emergency Dropsy Treatment

Upon detecting early dropsy, aquarists must act swiftly with emergency medical care. While advanced dropsy is nearly hopeless, fast intervention boosts the chances of recovery. Key action steps include:


Segregate the sick guppy in a separate quarantine tank. This prevents disease spread and allows tailored care. Make sure to use a separate net, siphon, and other equipment for the quarantine tank.

Epsom Salt Baths

Epsom salt draws excess fluids out of the body and reduces swelling. Dissolve 1-3 teaspoons per gallon in a small container and bathe the guppy for 15 minute intervals. Repeat baths 2-3 times daily.


Antibiotics combat the underlying bacterial infection causing fluid retention. Combinations with kanamycin or nitrofurazone work well. Follow dosing directions carefully and treat the whole course.

Supportive Care

Boost chances of recovery through excellent water quality, stress reduction, and appetite stimulation.

Increase water changes, add air stones, and reduce tank activity. Offer blanched peas or live foods to entice eating.

Methylene Blue Dips

Optional methylene blue baths have mild antifungal and antibacterial effects. Use a half-dose dip for 15 minutes after antibiotic baths. This can nip secondary infections in the bud.

Persistence and vigilance are vital, as dropsy requires aggressive measures. Even prompt treatment sometimes fails to save guppies in the end stages.

Do not give up too soon, but be realistic if the fish deteriorates despite best efforts.

Preventing Dropsy Outbreaks

An ounce of prevention truly outweighs a pound of cure when it comes to guppy dropsy. Avoiding outbreaks in the first place is the ultimate goal. Proactive steps fishkeepers should take include:

Quarantine All New Arrivals

A strict quarantine protocol prevents introducing disease. Acclimate new guppies in a separate tank for 4-6 weeks before adding to the main community.

Perform Regular Water Changes

Do weekly water changes of 20-30% to maintain pristine water quality. Test ammonia, nitrite, nitrate, and pH routinely.

Feed a Varied Diet

A mix of flake foods, live foods, and occasional frozen or freeze-dried treats provides balanced nutrition for robust health.

Use Hospital Tanks

Set up an emergency hospital tank for isolating sick or injured fish for treatment. Have medications on hand before problems arise.

Reduce Stressors

Crowding, aggression, or harassment from inappropriate tankmates creates chronic stress. Ensure sufficient space and compatible communities.

Choose Hardy Stock

When buying guppies, prioritize vigor over flashy colors or long fins. Select active fish from reputable breeders, not big-box stores.

Quarantine New Plants Too

Rinse and disinfect new plants using diluted bleach, potassium permanganate, or vinegar before placement in the main tank.

Remaining ever vigilant for early symptoms, isolating sick fish immediately, and dedicating to prevention reduce dropsy risks.

While guppies may always carry some inherent predisposition, proactive aquarists can gain the upper hand against this destructive disease.

With attentive care and quick action at the first signs of trouble, guppies can continue to thrive and delight us with their lively antics and dazzling colors for years to come.

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About Dr.Chamika

Hello, I'm Dr. Chamika. I am a Researcher in Water quality, Aquatic organisms, and Environmental chemistry. I am a passionate fish keeper, with10 years of experience. My mission is to help other aquarists experience the joy of fish keeping.