I had recently bought a blue betta from a local petsmart he wasn't entirely healthy when I got him but he was active and looked like he would pull through. I had done some research and found that he had velvet. So I began treating him for this with a natural parasite medication. It said to slightly turn the heat up in the tank so I did for about 81 degrees and keep the lights off. When I came home from work he had an s shaped spine and seemed to have the shimmy. I looked at the temp and for some reason it was at 85 degrees so needless to say that heater went bye bye. I have had him in a quarantine tank so I could closely observe him it seems that the velvet is gone but he still has a swollen swim bladder causing the s shape in his swimming I was told to treat him for dropsy because he probably wasn't going to make it. He had a stress stripe for a few days and was very disinterested in eating. Yesterday he had his first meal in like 5 days he couldn't eat the pellet it was to had or something but I put some flakes in a dropper and hand fed him he was trying to eat and now today as trying to reintroduce him to the tank he is showing signs of swelling in his swim bladder again and he is swimming as if he had an s shaped spine. What do I do?