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Discussion Starter · #1 ·
Hi everyone,

My betta recently developed severe fin rot on his tail fin that is now under control and healing. However, I've been noticing a lump that developed in the photo below, that is slowly getting bigger, thicker, and receding and eating away at another fin. There are specks of red so I'm sure it's inflamed... but I have no idea what it is. I feel it's advanced fin rot but it's very different from any fin rot photos I've seen online, and I havent seen any other fish diseases that match this. Any idea what it is and how to treat? Best I can think of is regular water changes and maybe salt baths. I also have NeoPlex.

Tank: 4 gallon filtered, heated tank (79C) with water parameters at 0 ammonia, 0 nitrite, and 20 nitrate.


2 Posts
Discussion Starter · #2 ·
Missing Info:

Does your tank have an air stone or other type of aeration? No
Does your Betta have tank mates? What kind? No tankmates

What food brand do you use? NorthFin
Do you feed flakes or pellets? Pellets
Freeze-dried? No
Frequency? Twice a day, 4-5 pellets per feeding

Before your Betta became ill how often did you perform a water change? Weekly
What percentage of water did you change? 50%
What is the source of your water? Tap
Do you vacuum the substrate or just dip out water? Vacuum
What additives do you use other than conditioner? Vitachem drops
What brand of conditioner? Stresscoat

Water Parameters:
What are your water parameters? Please give exact numbers. If tested by pet store please get exact numbers. "Fine" or "Safe" won't help us help you. Important:
Ammonia: 0
Nitrite: 0
Nitrate: 20
pH: 7.5
Hardness (GH): very hard water. Unsure
Alkalinity (KH): unsure

Symptoms and Treatment:
When did you first notice the symptoms? 2 months ago
How has your Betta’s appearance changed? Thickening of infected area, receding fin
How has your Betta’s behavior changed? None
Is your Betta still eating? Yes
Have you started treating your Betta? If so, how? Just water changes
Does your Betta have any history of being ill? Fin rot
How long have you owned your Betta? 1 year
Was he or she ill or suffering some sort of damage when purchased? No
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