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My fish has an odd growth under its eye. Is it an infection?

Updated On September 23rd, 2025

There is an odd growth under his or her left eye. None of the other 7 fish have it. We treat the water with ick gaurd and it is the size of a puple it has been there for just about 2 weeks now. What is it

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on April 24th, 2018

It may be a bacterial infection or trauma. Monitor for bullying since you have other fish. Most minor infections can be managed or resolved by maintaining pristine water quality. A bit of plain aquarium salt (NOT table or Epsom salt) can be used as a general tonic to aid in recovery, reduce stress and improve gill function. Dissolve 1 tablespoon per 5 gallons of water in a cup or two of tank water and gently pour it into the tank. Treat for 10-14 days then reassess the condition. If the condition is unchanged, consider a broad spectrum antibiotic. You can find one in the aquarium section of the local Petco. Follow label directions carefully and remove the carbon filter insert during treatment if indicated.

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