What size is your tank? 2.5 gallons
What temperature is your tank? 76 degrees Fahrenheit
Does your tank have a filter? No. (It came with one, but I was recommended to remove it.)
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? New Life Spectrum Betta Formula and Omega One Freeze Dried Blood Worms
How often do you feed your betta fish? once a day, six pellets of NLS and one blood worm.
How often do you perform a water change? twice a week
What percentage of the water do you change when you perform a water change? One 75%, one 100%.
What type of additives do you add to the water when you perform a water change? Water Conditioner (lately, I've also been adding Aquarium Salt)
Have you tested your water? If so, what are the following parameters? I have not tested them.
Symptoms and Treatment
How has your betta fish's appearance changed? He use to have a white rim around his fins (seen in my avatar). Now he does not. Also, his top fin has curled down.
How has your betta fish's behavior changed? No.
When did you start noticing the symptoms? Two weeks ago.
Have you started treating your fish? If so, how? Yes, aquarium salt.
Does your fish have any history of being ill? No.
How old is your fish (approximately)? I got him on 12/22/13
I'm glad you do not think it's fin rot. If it is simply a cosmetic issue, I'm completely fine. I really don't care how he looks, as long as he is happy, healthy, and pain-free.