Here's one for ya...it sounds like you are doing better but know this.....
READ THE BOTTLE OF AMQUEL + !!!!!!!!
first, your wife probably added way too much, which caused your tank to stink, (or i it possible)
second, amquel + takes a butt load of oxygen out of the water when it declorinates and removes the ammonia and nitrites... which is not good, duh.
third, the loss of oxygen could cause the heavy and rapid breathing....
so that is just part of my thought on this...i really have no clue where the cloudy water comes into play...or the smell in reality...that smell of amquel dissipates pretty good when you add it to the water( unless you have WAY too much ^like mentioned earlier.
hope this helps for the future.