“One and Only Nitrifying Bacteria for saltwater aquaria is the result of the latest scientific knowledge on nitrifying bacteria
Through experience, and confirmed by research, establishing the biological filter in a newly set-up saltwater aquarium can take a long time, longer than a freshwater aquarium, especially in the case of nitrite.
Even aquaria without fish, such as coral-only tanks, can experience high ammonia and nitrite concentrations. Why? Because these tanks typically contain liverock and if the liverock is not ‘cured’ well there will still be a lot of organic material on it which decays into ammonia…”