I had a betta in a 10 gallon tank, in about 4 gallons of water, with manual water changes. The tank broke, so I had to go buy another tank, and I got a 1 gallon tank because it's all I have room for when I move in a couple weeks.
I acclimated him, the water is all fine, but today I went to look at him, and he was at the bottom by the plant, and seemed to be breathing rather heavy. His gills are puffing out like his is gasping for air type thing....
I'm not sure what to do or what it could be. Any suggestions. Nothing has changed except the tank, and I have glass gem stones on the bottom instead of the gravel because it was old and gross.