Maybe I'm being paranoid but I think Kasper has a bit of bloat going on in his tummy.
What size is your tank? 3 gallons
What temperature is your tank? 78F
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? None
What type of food do you feed your betta fish? Omega One Betta Buffet Flakes and Omega One Betta Treat (Freeze-Dried Bloodworms). Both foods are soaked (flakes get less water and bloodworms get a bit more)
How often do you feed your betta fish? 2 times a day
How often do you perform a water change? 3 times 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 Tap Water Conditioner
Have you tested your water? If so, what are the following parameters?
Hardness: Should be soft as it's mountain-water.
Alkalinity: (No idea)
Symptoms and Treatment
How has your betta fish's appearance changed? His stomach has rounded out a bit.
How has your betta fish's behavior changed? No change in behavior, still the same peppy little guy.
When did you start noticing the symptoms? Friday (the 13th) of 2013
Have you started treating your fish? If so, how? I let him fast on Saturday, then fed him a tiny amount of soaked flakes on Sunday. Not sure if I should fast him again or not.
Does your fish have any history of being ill? Not that I know of. He was the healthiest looking fish I could find.
How old is your fish (approximately)? Maybe... 4 months? I'm not sure.
Other info: Kasper is a Double-Tail. So yes, I've already read about Double-Tails being susceptible to bloat, dropsy, and SBD.
You can see his body shape here, is it normal for his head and body to be that wide while his back end is skinny?
Blurry but you can see his tummy hanging down a little bit here.
I hope I'm just being paranoid. I really hope so.