Hey all. I've a bit of a quandary on my hands here. My betta's been doing fine, but lately I've noticed a strange lump on his rear fin. It appears to be on both sides, and I'm not sure what to do about it. Archer (the fish) seems unaffected: he eats fine, swims normally, and has plenty of energy. Maybe someone can help me out? I've had bettas before, but he's my first in a few years and I've never seen this happen before. Pics and tank specs below.
What size is your tank? 5 gal
What temperature is your tank? 76-82
Does your tank have a filter? yes
Does your tank have an air stone or other type of aeration? no
Is your tank heated? yes
What tank mates does your betta fish live with? none
What type of food do you feed your betta fish? primarily betta pellets
How often do you feed your betta fish?
How often do you perform a water change? weekly
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? betta water conditioner
Have you tested your water? If so, what are the following parameters?
Symptoms and Treatment
How has your betta fish's appearance changed? Tumor-like bump on rear fins; see pics
How has your betta fish's behavior changed? none, really. Swims and eats fine.
When did you start noticing the symptoms? NOW lol
Have you started treating your fish? If so, how?
Does your fish have any history of being ill? has had swim-bladder disease before; quick recovery
How old is your fish (approximately)? I've had him since Christmas-- was an adult when I bought him.