Hello all! So I have 1 betta in a 3.5 gallon, heated, cycled, and filtered tank and he recently has been getting really bloated when he eats. I used to feed him 6 pellets a day, 3 in the morning and 3 at night, and he was always fine. But recently he has been getting really bloated so I fasted him and he went back to normal. After the fast I only gave him one pellet. Now today when I came back home, he was bloated and when ever he would try to swim down he would quickly float back to the surface. I think this is a possible swim bladder issue, but I have absolutely no idea what to do. I really need your guys' help. Thank you in advance.