Fish Health & Troubleshooting
When things go wrong in your aquatic ecosystem, speed and accuracy save lives. Science-backed protocols to help you diagnose symptoms and restore balance to your tank.
Common Symptoms & Instant Fixes
Cloudy water
Milky white or hazy appearance usually indicating a bacterial bloom.
White spots
Small salt-like grains on fins and body (Ichthyophthirius multifiliis).
Not eating
Refusal of food accompanied by lethargy or hiding behavior.
Gasping for air
Fish lingering at the surface or breathing rapidly.
Fish Disease Diagnosis
Select your fish's symptoms and get a ranked list of possible diseases with immediate actions and links to full treatment guides.
Start Diagnosis →For educational purposes only. For critical stock, consult a licensed aquatic veterinarian.
Goldfish Diseases: Symptoms, Treatment and Prevention
Common goldfish diseases explained — swim bladder, ich, fin rot, dropsy, velvet. Symptoms, treatment, and prevention reviewed by a fish veterinarian.
Aug 3
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Neon Tetra Disease: Identification, Treatment, Prevention
Neon tetra disease explained — symptoms, the Pleistophora hyphessobryconis parasite, and how to distinguish it from columnaris and ich.
Aug 3
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Columnaris in Fish: Symptoms, Treatment, and Prevention
Identify and treat columnaris (cotton wool disease) in freshwater fish. A vet-reviewed guide on symptoms, medications, and prevention.
Jul 18
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Dropsy in Fish: Symptoms, Causes, and Treatment
Complete guide to dropsy in fish — pinecone scales, causes, and antibiotic treatment. Identify early symptoms, prevent this deadly condition.
Jul 12
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Velvet Disease in Fish: Symptoms, Causes, and Treatment
Complete guide to velvet disease in fish — gold dust symptoms, copper treatment, and prevention. Identify, treat, and prevent this parasite.
Jul 12
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Swim Bladder Disease: Treatment & Recovery Guide (Betta, Goldfish)
Complete swim bladder disease treatment guide: symptoms, fasting, Epsom salt baths, and when to use antibiotics for bettas and goldfish.
Jul 5
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Fish Medication Safety: How to Use Aquarium Medications
Learn how to use fish medications safely — dosage, tank impact, quarantine tanks, and when to see a vet.
Jul 2
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Why Do Fish Die Suddenly? Common Causes
Common causes of sudden fish death and emergency steps to save remaining fish. Learn warning signs, water testing, and prevention.
Jul 2
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Common Betta Fish Diseases: Identification and Treatment
Learn to identify and treat the most common betta fish diseases including fin rot, ich, velvet, dropsy, and more. Early detection saves lives.
Jun 30
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Fin Rot in Fish: Causes, Stages, and Treatment Guide
Complete guide to identifying and treating fin rot in aquarium fish. Learn the stages, medications, and prevention strategies for healthy fish.
Jun 30
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Ich (White Spot Disease) in Fish: Symptoms, Treatment & Prevention
How to identify and treat ich (white spot disease) in freshwater fish. Step-by-step 7-day treatment cycle, medication dosages, and proven prevention tips.
Jun 30
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