Fluval Biological Enhancer is a responsive biological aquarium supplement that immediately inoculates aquarium water with a powerful team of beneficial bacteria providing a safe biological habitat for your fish. It goes to work fast releasing massive amounts of beneficial bacteria that eliminate toxic ammonia and nitrites while creating a biologically well- balanced aquarium for healthy fish to thrive. Fluval Biological Enhancer is strongly recommended for new aquariums as they do not contain the necessary concentrations of beneficial bacteria required to metabolise the waste that fish produce. It quickly establishes safe and essential conditions in new aquarium set-ups so that you can introduce fish to new aquariums immediately. Regular application helps to competitively exclude the establishment of undesirable bacteria in aquariums. Fluval Biological Enhancer provides consistent results thanks to our unique and proprietary bio-floc technology that ensures product stability efficacy and shelf life. High-quality production processes ensure that every container contains pure safe bacterial colonies free of undesirable contaminants. Key Features: - For fresh and saltwater aquariums - Powerful team of beneficial bacteria immediately innoculates aquarium water - Creates a safe biological habitat for your fish - Prevents loss of fish - Eliminates ammonia and nitrite - All-natural product - Will not harm plants animals or humans - Bio-floc technology ensures product stability efficacy and shelf life - Every container contains pure safe bacterial colonies free of undesirable contaminants - Does not require refrigeration Size: 500 mL