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Smelling salts are a chemical compound that releases small amounts of ammonia gas, which essentially jump starts your bodyâs nervous system. The ammonia causes blood vessels in your nasal passages to expand providing an instant increase in oxygen to your brain meaning an instantaneous boost of alertness and power.
Ammonia, in the aquarium hobby, refers to two chemical compounds, free ammonia (NH3) and ammonium (NH4+) together. Ammonia is a food source for nitrifying bacteria and is toxic to fish, amphibians and invertebrates.