So yes my betta who was fine 2 hours ago is now floating upside down at the top of the tank and struggling to get right side up again. He's in a 2.5G tank with a heater. I've put in some Antifungal, anti internal bacteria stuff. The only other meds I have are betta fix and anti ulcer and open wounds. So this is most likely dropsy or a problem with his swim bladder. Is there anything I can do?