So, I've had my betta in a 5.5 gallon aquarium for about 3 months. He used to be able to swim in the middle and bottom of his tank, but the past month he just isn't the same anymore. Sometimes he tries to swim and he ends up on his side, and tries to swim to the bottom of the tank but just floats back up and doesn't move that much. His fins aren't clamped, he is loosing a little bit of color. I have him on a 3 day fasting and planning to give him thawed peas, and doing frequent water changes. I think he might have swim bladder issues. I am also feeding him live food and varying his diet. Any advice would be great.