A single oxygen atom, not yet bonded to anything. Extremely powerful oxidizer when harnessed.
When combined with chlorine, nitrogen creates chloramines, which do not belong in our pool. Nitrogen can be found in many swimmer wastes (perspiration, suntan oil, hair tonics, etc.) or be introduced by other means.
A granular form of sodium persulfate or potassium monopersulfate, used to oxidize materials such as microorganisms, contaminants or bromamines.