DrTim's Aquatics One & Only Live Nitrifying Bacteria for Cycling Aquaria, Freshwater, 4 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. Use when setting up a new tank, after a disease treatment or water changes. 4 oz size for freshwater aquaria up to 60 gallons. One and Only has no sulfur or other offensive odors. Made by the recognized expert in aquarium nitrification and microbiology.

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