What size is your tank? 5 gall
What temperature is your tank? ~80 F
Does your tank have a filter? No
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? There is another female betta sharing the tank, but they are separated.
What type of food do you feed your betta fish? Mini-pellets
How often do you feed your betta fish? once or twice a day with a fast day
How often do you perform a water change? Once a week
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? API 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? Where the egg spot was there is now an engorged red lump
How has your betta fish's behavior changed? Not at all, she is still active and hungry
When did you start noticing the symptoms? Yesterday
Have you started treating your fish? If so, how? No
Does your fish have any history of being ill? No
How old is your fish (approximately)? A month or two, maybe.
Yesterday I notice one of my new females in quarantine has a red bump where her egg spot should be. When I woke up today, it was even more engorged. It does not look like it pains her, because she'll still rest on the gravel substrate, or swim along the bottom with it occasionally bumping the gravel. And she's active in exploring the tank and so on. What could it be?