Pygmy Cory — Bloated or Swollen
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⚠️ Urgent · physical

Why Is My Pygmy Cory Bloated or Swollen?

Corydoras pygmaeus
🐟 Species: Pygmy Cory
🔬 Problem: Bloated or Swollen
📋 Category: physical
⚡ Urgency: urgent

A bloated or swollen Pygmy Cory is a serious condition, often indicating internal bloating, constipation, or infection. Immediate action is crucial to prevent further complications. Owners should first consider the fish's recent diet, water conditions, and behavior changes.

Common Causes of Bloated or Swollen in Pygmy Cory

Internal Bloating

Most Likely

Due to overeating, constipation, or parasites.

Infection

Possible

Bacterial or fungal infections can cause bloating and swelling.

Disease

Most Likely

Conditions like dropsy or swim bladder disease can lead to this appearance.

Gastrointestinal Blockage

Possible

Obstructions in the digestive tract can cause swelling.

Stress

Less Common

Stress from tankmates or environment can trigger bloating.

How to Diagnose

Follow these steps in order. Stop when you identify a likely cause and move to treatment.

  1. Observe the fish's behavior and appearance closely.

    Look for signs of distress or changes in swimming patterns.

  2. Check the water quality parameters such as pH, temperature, and ammonia levels.

    Poor water conditions can exacerbate bloating.

    Recommended: pH test kit
  3. Examine the fish's diet and feeding habits.

    Ensure the diet is appropriate for Corydoras pygmaeus and that overfeeding is not occurring.

  4. Inspect the fish for external parasites or signs of injury.

    Parasites or injuries can lead to secondary infections.

  5. Consider the fish's behavior and tank environment for signs of stress.

    Stress can contribute to bloating and should be addressed.

How to Fix It

  1. Increase water changes to maintain optimal water quality.

    Water changes help to remove waste and reduce stress.

  2. Adjust the diet to a more easily digestible food, and reduce feeding frequency.

    Feeding smaller, more frequent meals can prevent overeating and constipation.

  3. Consider adding a probiotic to the fish's diet to support gut health.

    Probiotics can help maintain a healthy gut flora.

  4. If external parasites are present, treat with an appropriate medication.

    Follow the manufacturer's instructions carefully.

  5. Remove any sources of stress and ensure tankmates are compatible with the Pygmy Cory.

    A peaceful and stress-free environment is essential for recovery.

Prevention

Prevent bloating by maintaining clean water, feeding a balanced diet, and providing a stress-free environment for Pygmy Cory.

When to Seek Expert Help

See a vet if: Seek veterinary assistance immediately if the Pygmy Cory's bloating does not improve or if other symptoms are present, such as loss of appetite or difficulty breathing.

📖 Full Care Guide

Learn everything about keeping a healthy Pygmy Cory — tank setup, water parameters, diet, tank mates, and disease prevention.

Pygmy Cory Care Guide →

🔬 AI Symptom Checker

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Frequently Asked Questions

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Editorial review

This guide was reviewed for biological accuracy and practical aquarium care guidance. Always test water parameters before treating a sick fish — poor water quality is the most common root cause. Consult an aquatic veterinarian if symptoms persist after 48 hours of correct treatment.