Well, I'm sad to say, I'm pretty sure our Betta Lava has dropsy. He's really bloated and his scales are sticking out quite bad. Anything I can do, our just continue to feed him and let him just pass away???
You can try him in 1-3 tsps of epsom salt per gallon and if you can locate Seachem Kanaplex or kanamycin, you can try to treat him with that. Any other available meds won't work because they don't absorb well through the skin/gills.