I have had a betta with swim bladder for the last three months. He is in a 2 gal tank with plants to win under to avoid popping out of the water like a balloon. I do 25% water changes Monday through Wednesday and about a 50-75% every other week. His water temperatures are an average of about 78f. I have fed him daphnia, live brine shrimp and soaked pellets every other day but constantly struggles to eat. I got him from a friend that was going to give him back to the pet store but they figured that they would put him down due to his problem. He's been like this for about four months now and I'm thinking about putting him down due to him having a low quality of life. Any help?