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My betta fish has a face bump and white web-like stuff. Is he sick?

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish | Male

My betta fish has a bump on his face between his right eye and his mouth. It wasn't there 2 days ago. He also looks like he has some white stuff on him, it looks weblike rather than spots. His behavior and appetite are normal so far. I noticed this yesterday so I did a 100% water change, this morning there seems to be a bit more of the white stuff and the bump is a bit larger.

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on July 10th, 2018

Continue with the water changes to maintain water quality. Change no more than 30% of the total volume though. Use aged or conditioned water that is temperature matched to prevent further stress or shock. Bettas do best between 78 F and 80 F. Plain aquarium salt (NOT table salt or Epsom salt) can be used as a general tonic to treat minor infection and aid in any recovery. Dissolve 1 teaspoon of salt per gallon of water in a cup of tank water then gently pour it into the tank. Treat for 10-14 days then reassess his condition. Perform partial water changes afterwards to reduce salinity. Do not treat with salt for more than 14 days in a row. If there is no change, consider a broad spectrum antibiotic. One can be found 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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