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Columnaris in Aquarium Fish: The Disease That's Often Mistaken for Fungus
by Bob Steenfott June 09, 2026

Columnaris is a fast-moving bacterial disease that is frequently mistaken for fungus in freshwater aquariums. Learn how to recognize the symptoms, distinguish it from true fungal infections, and explore treatment and prevention strategies before the disease spreads.

Posted in aquarium fish disease, columnaris, fish bacterial infection, Fish Diseases, freshwater fish disease, mouth fungus, saddleback disease

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