Alright, adding the following information....
What size is your tank? 2.5 gallons
What temperature is your tank? 78-80 degrees
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? Aqueon betta pellets
How often do you feed your betta fish? Once in the morning, 3 pellets
How often do you perform a water change? 2x a week
What percentage of the water do you change when you perform a water change? 50-75%
What type of additives do you add to the water when you perform a water change? Top fin dechlorinater.
Have you tested your water? If so, what are the following parameters?
Haven't tested it lately
Symptoms and Treatment
How has your betta fish's appearance changed? The edges of his fins look ripped
How has your betta fish's behavior changed? No
When did you start noticing the symptoms? A couple days ago
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)? No idea, I've only had him a couple weeks. He came from PetSmart but he looks full grown. I'm terrible with size but he's probably 2 1/2 to 3 inches