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Discussion Starter · #1 ·
My betta just recently got this lump on his side. Not sure what it is. I've faster him for a day or so and only fed him 1-2 pellets twice a day. He has sunlight and a heater that keeps it at 78 degrees. 5 gallon tank with a filter. The water was just recently changed. See pictures Freshwater aquarium Organism Amphibian Aquarium decor Aquarium .
 

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Discussion Starter · #3 · (Edited)
Large lump on side of betta

My betta just recently got this lump on his side. Not sure what it is. I've fasted him for a day or so and only fed him 1-2 pellets twice a day. Please help
Housing
What size is your tank? 5 gallon
What temperature is your tank? 78 degrees
Does your tank have a filter? Yes
Does your tank have an air stone or other type of aeration? Yes
Is your tank heated? Yes
What tank mates does your betta fish live with? None

Food
What type of food do you feed your betta fish? Pellets
How often do you feed your betta fish? Twice a day

Maintenance
How often do you perform a water change? 3-6 weeks
What percentage of the water do you change when you perform a water change? 50%
What type of additives do you add to the water when you perform a water change? None

Water Parameters:
Have you tested your water? No

Symptoms and Treatment
How has your betta fish's appearance changed? Large lump on side
How has your betta fish's behavior changed? No changes
When did you start noticing the symptoms? Few days ago
Have you started treating your fish? If so, how? I read that i should fast him for a day and he might be constipated. Did that. And no changes
Does your fish have any history of being ill? No
How old is your fish (approximately)? 1year

See pictures. Please help Organism Aquarium Freshwater aquarium Amphibian Art
 

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Is the lump only on one side or is it symmetrical? Can you get a view from the top as well? You can cup him in a plastic cup to get easier pictures.

I doubt it's just constipation. Have you seen his poops around at all? It could be internal parasites or an infection of the GI track.
 

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You also have an issue with water changes. A filtered 5 gallon tank should get one 50% water change a week. Not one every 3-6 weeks.

I agree with lil, it might be a parasite or infection.
 
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