I just bought her the other day and she is in a temporary bowl. She will be living in a 1 gallon tank with a filter.
The water should be around 75 to 80 degrees.
I feed her once a day and I feed her BettaMin Tropical Medley.
I just changed the water and I used spring water and AquaSafe Water Conditioner.
I have not purchased a test kit yet.
I have another Betta living in a 1 gallon tank with a filter, she eats the same food and the water is around the same temperature. I have used the same water and the same conditioner as well. There have been no problems with her, just the newly purchased Betta.
-After reading the article-
I think I have discovered the problem to her swim bladder. The ride from the store to my home was a rather bumpy one and I think this is the cause. Unless, Wal-Mart overfed her. Other than that, her condition is most likely permanent.
:( Poor thing.