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Nitrex
Cultures nitrifying bacteria to eliminate ammonia, nitrite, and nitrates within hours! Lets you keep more fish and invertebrates in your aquarium. Granular media fits into almost any filter or under an undergravel plate. 200 gram box treats up to 75 gallons of water. The Nitrex Box allows Nitrex to be used as a denitrification media. Holds package of Nitrex and can be hidden in your aquarium gravel. Self contained, no air or electricity required. Use one box per 30 gallons of water.
