API Nitra-Zorb Removes Aquarium Toxins Size 6 [Aquarium Chemical Media, Aquarium Supplies] 4 count

API Nitra-Zorb for API and Rena Filters is a convenient pouch of natural and synthetic ion-exchange resins that selectively remove ammonia, nitrite, and nitrate from freshwater aquariums. Completely phosphate-free and ready to use! * Removes toxic ammonia, nitrite and nitrate * Provides chemical filtration to support a successful aquarium startup * Ready to use pouch for freshwater fish tanks * 1 large pouch treats up to 55 gallons API Nitra-Zorb filtration pouches are scientifically proven to remove toxins in aquarium water, including NH3, NO2-, and NO3- to support the health and longevity of fish and plants. Instructions: Easy-to-use pouch works 2 months, change regularly for clean and clear water.