NITRA-ZORB POUCH
- 2 Packages - 7.4 Ounce Each Package - Size 6.
- A convenient filter cartridge for your Rena SmartFilter.
- Natural and synthetic ion-exchange resins.
- Selectively removes ammonia, nitrite, and nitrate from freshwater aquariums.
- Reduces unhealthy ammonia surges while establishing the aquarium's ecosystem.