One and Only Live Nitrifying Bacteria prevents new tank syndrome by instantly working to establish a biofilter in newly set-up aquaria. Use One and Only to control ammonia and nitrite levels. One and Only Live Nitrifying Bacteria has no sulfur or other offensive odors.

- Foldable and portable cat bagDr. Tim's Aquatics One & Only Live Nitrifying Bacteria for Reef Aquarium
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