I got a Betta from the pet store about 3 weeks ago. I wasn’t planning on getting him but he was sick so I brought him home . Originally I thought it was swim bladder disease so I fasted him gave him a pea and fasted him again after that didn’t work I gave him a salt bath and I’ve been repeating the cycle since. He’s still bloated but when I got him he was alway in his side at the bottom of his tank and now he’s resting at the top with his nose out of the water. Sometimes he still lays at the bottom of his tank as well. My issue is that he doesn’t seem to be getting better. He’s currently in a .5 gallon tank because I’m worried if he’s in the bigger tank that’s meant for him he won’t be able to get to the top also its a divided tank so if it’s something contagious I don’t want the fish in the other side to get sick. Does anyone have a suggestion of what else could be wrong with him or anything else I can try to help him?