Also, you are over medicating. You are adding all this crap and you expect the fish to NOT stress out? Come on, wouldnt you stress out if you were doing that to yourself? Remove the heater, replace the heater, stop medicating, and just do water changes. Increase your temp (with a new heater) to 82 add some salt, and leave him be.
exactly.
sounds like you're doing more harm than good. The less "stuff" in the water(besides salt) the better