Fluval Cycle Biological Enhancer goes to work fast, releasing massive amounts of beneficial bacteria that eliminate toxic ammonia and nitrite to establish a biologically-balanced aquarium. Features All-natural water care – creates a safe biological habitat to prevent fish loss Infused with a powerful team of beneficial bacteria that immediately inoculates aquarium water Extremely effective when setting up a new aquarium or introducing new fish to an existing one Equally useful during water changes and filter media changes, when good bacteria is depleted Regular application helps to completely exclude establishment of undesirable bacteria Eliminates ammonia and nitrite Bio-Floc technology ensures product stability and efficacy, devoid of any contaminants For use in freshwater and saltwater aquariums Label Info 4 fl oz / 120 ml bottle treats aquarium up to 240 US Gal / 908 L 8.4 fl oz / 250 ml bottle treats aquariums up to 500 US Gal / 1892 L 16.9 fl oz / 500 ml bottle treats aquarium up to 1000 US Gal / 3785 L 0.5 US Gal / 2 L bottle treats aquariums up to 4000 US Gal / 15140 L
