FritzZyme TurboStart 700 contains the same proven freshwater strains of effective, live nitrifying bacteria as FritzZyme 7 but at 15 times the concentration. TurboStart 700 reduces fish loss due to toxic levels of ammonia and nitrite. Establishing colonies of nitrifying bacteria without FritzZyme can take weeks; FritzZyme TurboStart completely cycles aquariums in five days or less, allowing for safe, immediate addition of livestock. TurboStart may be added to new tanks or established systems any time the biofilter needs fortification, including after water changes, aggressive cleaning, adding new livestock, medicating or changing filter media.