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Fish/Flower Horn fish with swollen eye


I have a Flower Horn who is about 1.5 years' old. About 10 days ago, I noticed that his left eye was swollen out of its socket and the covering on top of his eye( which is usually transparent) had become translucent and cloudy. About 5-6 days ago, he stopped eating.

A local aquarium keeper suggested treating him with Paracidol on day 1, Bactinol on day 2 and Stress Heal on day 3, with a 10% water change every day. So far, there has been no improvement and the eye looks the same.

I happened to read online that this could be what is commonly known as Popeye and that Maracyn is effective in treating it. So I've placed an order online and am waiting for it to be shipped to me from Chicago( I live in India).

I would really appreciate any advice you can give me on treating my fish's eye condition. I'm a first-time owner and don't have much experience.

Thank you.


Hi Keerthi,
  "Popeye" is a symptom, as opposed to a cause.  Popeye can be caused by many things including mechanical damage, poor water conditions, or various infections.  You can try Maracyn and hopefully that will help.

-- Ron C.
  Cichlid Research Home Page <>


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Ron Coleman


I am an expert on cichlid fishes, particularly New World cichlids. My broader expertise includes the behavior, ecology and reproduction of fishes in general. (I am NOT an expert on Goldfish). Please do not use abbreviations, such as "my GT has a swollen eye" because I don't know what a "GT" is. The more clearly you can explain your question, the better chance I have of understanding what it is that you seek. I keep fishes both as a scientist and as a hobbyist and I currently maintain about 140 aquariums.


I am an Associate Professor at the California State University, Sacramento in the Department of Biological Sciences, and I run a website, called the Cichlid Research Home Page . I also write for many popular aquarist magazines, and I was editor of Cichlid News magazine for several years. I am a scientist and I spend my time teaching fish biology, ecology, behavior and evolution and doing research on the reproductive biology of fishes, particularly cichlids. I do research in the laboratory and in Costa Rica, Nicaragua and Mexico. My main interest is understanding the evolution of parental care in fishes. I am interested in encouraging greater public awareness, understanding and participation in science.

Cichlid News, Tropical Fish Hobbyist, Freshwater and Marine Aquarium, Science, Behavioural Ecology and Sociobiology, Copeia, Canadian Journal of Zoology, Trends in Ecology and Evolution, AUK, Environmental Biology of Fishes

PhD (Toronto, 1993) MSc (Simon Fraser, 1986) BSc (British Columbia, 1983)

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