API Nitra-Zorb for API NexxFilter & Rena Smartfilter Size 6 = 7.4 oz (Treats 55 Gallons)
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!
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.