The key to setting up a successful aquarium is to quickly convert the fish waste to a non-toxic form. This is done by nitrifying bacteria. Under normal conditions it can take 30 to 45 days for these bacteria to become naturally established in a newly set-up aquarium. Unfortunately, during this time period, ammonia and nitrite can increase to levels toxic to fish a common problem called new tank syndrome. Drtim's one & only nitrifying bacteria are the result of the latest scientific research and are used by public aquariums and professionals around the world to control ammonia and nitrite. Eliminates new tank syndrome_x000D_ instantly creates a bio filter_x000D_ removes toxic ammonia and nitrite, naturally_x000D_ no sulfur or other offensive odors_x000D_ no wait needed_x000D_ 100% natural_x000D_ use when setting up a new tank, after a water change, cleaning your filter, when adding new fish and after a disease treatment to control ammonia and nitrite. Good for 6 months at room temperatu