I noticed Dorothy had gotten some fin rot on his bottem finn like last week so I did some more frequent water changes (Yes I always add aqurim salt and condiner) and all the usal things. But then lastnight he was floting werdly. He was floting virticly

. (that probably wasn't spelled right) I don't know what caused this to happen or why. I did notice that he was looking quite frale and skinny. Any help would be grate.
Housing
What size is your tank?
2g
What temperature is your tank?
Around 78 f
Does your tank have a filter?
Yes
Does your tank have an air stone or other type of aeration?
Yes
Is your tank heated?
Yes
What tank mates does your betta fish live with?
None he lives alone
Food
What type of food do you feed your betta fish?
Pellets and some times Blood worms
How often do you feed your betta fish?
2 Pellets every eavning
Maintenance
How often do you perform a water change?
Onec a week
What percentage of the water do you change when you perform a water change?
50% one week 100% the next
What type of additives do you add to the water when you perform a water change?
Aqurim salt, Betta conditaner
Water Parameters:
Have you tested your water? If so, what are the following parameters?
I have a water testing kit but I dumped the water in the 2g out. I can't take a water test of the water in the other thank because the water in that tank is blue from the Betta Revive.
Ammonia

Nitrite

Nitrate

pH

Hardness: I know i have some what hard water
Alkalinity
Symptoms and Treatment
How has your betta fish's appearance changed?
Raged bottem fins, lossing color
How has your betta fish's behavior changed?
Just kinda flotes around all day
When did you start noticing the symptoms?
A week ago/lastnight
Have you started treating your fish? If so, how?
Yes, by putting him in a .5g tank (easer to do a water change every day) and putting some Betta Revive in his tank.
Does your fish have any history of being ill?
No, Dorothy is my little truper.
How old is your fish (approximately)?
I've had him for about a year and a half