Bio-Chem Zorb, a blend of resin and carbon filtration media, is compossed of two research-grade organic scavenger resins, two pharmaceutical-grade ion-exchange resins, and high-porosity activated carbon adsorbents in a filter pouch.
Continuously removes ammonia, nitrite, and nitrate from freshwater aquariums in a convenient pouch which fits into most external filters. Nitra-Zorb® is made of natural and synthetic ion-exchange resins. You can recharge up to 5 times with API Aquarium Salt. Completely phosphate-free