I received a betta fish from my friend a few months ago when she moved. He has had a swollen pink eye ever since before I got him. It doesn't look like the other pictures of popeye I've seen, since it doesn't have a white ring around it and the eye has no pupil. The fish is pinkish-purple all over, so maybe that's why his eye is pink.
Also, he started getting bloated a while ago, but not to a great extent and no pinecone scales. I had been feeding him twice a day, so I started feeding him only once a day and the bloat went down. However, his belly is still gray, which I've read is a warning sign. I do know that his previous owners kept him in a small vase and didn't change his water very often.
What size is your tank? 2.5 gallons
What temperature is your tank? Not sure
Does your tank have a filter? No
Does your tank have an air stone or other type of aeration? No
Is your tank heated? No, but I am planning to get a heater soon.
What tank mates does your betta fish live with? None
What type of food do you feed your betta fish? Pellets
How often do you feed your betta fish? Once a 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? 100%
What type of additives do you add to the water when you perform a water change? I forgot what it's called...it's a dechlorinator and slime coat enhancer by Tetra.
Have you tested your water? If so, what are the following parameters?
Have not tested
Symptoms and Treatment
How has your betta fish's appearance changed? He has always had the swollen eye, but the bloat came and went.
How has your betta fish's behavior changed? It hasn't, as far as I can tell. He's still swimming around, eating, and pooping normally.
When did you start noticing the symptoms? The belly issues started a couple weeks ago.
Have you started treating your fish? If so, how? I gave him some generic fish medicine when I first got him, as per the previous owner's instructions. It was supposed to help his eye, but it didn't seem to make a difference.
Does your fish have any history of being ill? Other than the eye, I don't know.
How old is your fish (approximately)? Probably 1.5-2 years.