Product details:

One and only live nitrifying bacteria removes toxic ammonia and nitrite, instantly working to prevent new tank syndrome by establishing a biological filter in your newly set-up aquarium. Use when setting up a new tank, after a disease treatment or water changes. 16 ounce size for saltwater aquaria up to 240 gallons. One and only has no Sulfur or other offensive odors. Made by the recognized expert in aquarium nitrification and microbiology.