Here is what the Drs. Fosters and Smith has to say about it:
Select strains of nitrosomonas, nitrobacter, and nitrospira eliminate
ammonia and
nitrite. This specialized bacterial additive rapidly breaks down nitrogen compounds.
Establishes and maintains the necessary bacterial populations required to efficiently process toxic ammonia to nitrite and then to nitrate.
Nite-Out II™ acts within a day or two to lower ammonia nitrogen and nitrite nitrogen levels naturally. Specially formulated to eliminate ammonia via a natural biologic process. Nite-Out II™ is a liquid nitrifying bacteria additive that contains select strains of nitrosomonas, nitrobacter, and nitrospira. Nitrosomonas convert ammonia to nitrite while nitrospira and nitrobacter convert nitrite to nitrate, thus making the ammonia less toxic to your fish and other aquarium inhabitants. The microorganisms contained in Nite-Out II™ are able to use carbon dioxide as the sole source of carbon, and are slow-growing. Treats up to 960 gallons.
I bolded and italicized the part that made the product sound more like SafeStart than cycle. I sent the company an email to confirm. I wish somebody local would just sell SafeStart so I could be done with it.