I added the aquarium salt and have been doing 100% water changes daily (with both salts) since. I keep him quarantined in a cup floating in his tank, the temp is abut 76-77.
yesterday, he seemed to be improving a bit, no more fuzzies, and he was resting horizontally, no funny tilt to his orientation.
today however, he's back to floating with his head pointing towards the surface. also, twice today i was certain he had passed, even when i would let my fingers break the surface of the water, he had no reaction whatsoever. not even gill movement. then after a few minutes, he would go crazy swimming around the cup and ramming his head into the sides or bottom for about 30 seconds. then proceed to let himself sink back down.
what the heck is going on?!