Well this info is terrible. I was given the wrong advice on my betta Facebook groups on cycling I guess.
I've no idea what that advice was, but when you cycle a new tank with fish present, it is not without its problems for the fish. Ammonia and nitrite are toxic, and the way these affect fish is probably why you are seeing increased respiration. Adding chemicals or substances to the water aggravates this.
The underlying issue is that many aquarists do not understand the incredibly complex inter-relationship that exists between fish and their aquatic environment, much more complex than any terrestrial animal on land.