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Discussion Starter · #1 · (Edited)
I got a Betta not too long ago, I haven't owned Bettas before but I'm trying my best with my new buddy, Merlin. He's in a 2.5 gallon tank, but I plan to move him up to a 5 gallon with a filter next pay day.

I noticed his top fin curling when I went to feed him tonight. His behavior is fine otherwise, he's active and eating well.

I'm not sure what's making his fin curl. Since I don't have a filter, I change 50% of his water daily. I tested the ammonia levels in his water and they were about 1 after changing his water for the day and adding water conditioner.

I was looking online and people were saying it could be fin rot, but he doesn't have any symptoms of it other than his fin curling. Any ideas?

I attached the best pictures I could get of his fin, he wouldn't stop moving. The black specs in one of them is on the outside of the tank, not on him.

How many gallons is your tank? 2.5
Does it have a filter? No
Does it have a heater? Yes
What temperature is your tank? 80 degrees fahrenheit
Does your tank have an air stone or other type of aeration? Yes
Does your Betta have tank mates? What kind? None

What food brand do you use? National Geographic
Do you feed flakes or pellets? Pellets
Freeze-dried? Yes
How often do you feed your Betta? How much? Twice a day, 3-4 pellets

Before your Betta became ill how often did you perform a water change? Daily
What percentage of water did you change? 50%
Do you vacuum the substrate or just dip out water? Vaccum
What additives do you use? Top Fin Betta Water Conditioner

Water Parameters:
Ammonia: 1
Nitrite: N/A
Nitrate: N/A
pH: N/A
Hardness (GH): N/A
Alkalinity (KH): N/A
(Sorry, haven't tested most of these)

Symptoms and Treatment:
When did you first notice the symptoms? Today
How has your Betta’s appearance changed? His top fin is curling slightly
How has your Betta’s behavior changed? Has not changed
Is your Betta still eating? Yes
Have you started treating your Betta? If so, how? No
Does your Betta have any history of being ill? No
How long have you owned your Betta? Was he or she a rescue? 1 week, no


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