Instant Ocean BIO-Spira Saltwater Live Nitrifying Bacteria 3.38 fl. oz

With patented nitrifying bacteria BIO-Spira accelerates the establishment of the bio-filter in newly set up saltwater aquariums. The live bacteria start working immediately to provide a safe and healthy environment for your fish without the long wait. BIO-Spira can also be used after a water change when adding new fish or after medicating.