DrTim's Aquatics One & Only Live Nitrifying Bacteria for Cycling Aquaria, Reef & Nano 8 oz

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. Great to use in a reef tank starting with dead rock. Use when setting up a new tank, after a disease treatment or water changes. 4-Ounce size for saltwater aquaria up to 60-gallon. One and Only has no sulfur or other offensive odors. Made by the recognized expert in aquarium nitrification and microbiology.

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