bloating

I’ve had this female betta for a 2 months now and the first week I got her, after feeding her I saw that she was bloated in the tummy so I didn’t feed her for two days. After that I bought her dried blood worms which she doesn’t like and the aqueon betta pellets which is her normal food now...

-10G tank, 78 degrees F -1 male Betta, 3 male tequila sunrise delta guppies, 3 male silver tip tetras -50% water change done on the 13th due to clouding water, added tbsp salt -KH 80 ppm -GH 120 ppm -pH 7.0 -Nitrate 20 ppm -Nitrite 0 ppm -Ammonia 0 One of the sunrise delta guppy’s seems very...