Light Colored Bump Near Eye On Female Betta Fish


New Member
I recently adopted a female betta fish from a family member and she is currently in a sorority with two other, younger females in a 10G tank. They get along well and everything seems good in that regard. A couple of days ago I noticed that this female had a (relatively) large, light-colored bump protruding near her eye. It seemed to appear overnight. She is still eating well but might be a big more lethargic than usual. The size has stayed basically the same, maybe it is has gotten a bit larger. The other two fish in the tank have no signs of anything, are energetic, and eating well. I am not sure on the exact age of the affected fish, but she was originally bought by the family member well over 1 year ago. Does anyone have any thoughts? (Other relevant info and pic below)
What is the water volume of the tank? 10G
How long has the tank been running? 3 weeks
Does it have a filter? yes
Does it have a heater? yes
What is the water temperature? 78
What is the entire stocking of this tank? (Please list all fish and inverts.) 3 female betta
How often do you change the water? 10-20% daily
What do you use to treat your water? Aqueon water conditioner
Do you vacuum the substrate or just the water? substrate, Fluval provac
*Parameters - Very Important
Did you cycle your tank before adding fish? Not fully, added bottle bacteria for a few days prior to adding fish.
What do you use to test the water? API fresh water master kit
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Yesterday (before water change), ammonia readings were 0.5 ppm, nitrites were 0 ppm, and nitrates were ~2.5 ppm, pH 7.2.
How often do you feed your fish? 2x day
How much do you feed your fish? 3-4 pellets each
What brand of food do you feed your fish? aqueon betta food
Do you feed frozen or freeze-dried foods? no
Illness & Symptoms
How long have you had this fish? 5 weeks
How long ago did you first notice these symptoms? 3 days ago
Have you started any treatment for the illness? no
Was your fish physically ill or injured upon purchase? no
How has its behavior and appearance changed, if at all? Eating well, slightly lethargic



I just wanted to say...Welcome to FishLore! Hopefully someone will be around soon to answer your question

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