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

Composed of natural and synthetic ion-exchange resins in a convenient pouch. Selectively removes ammonia, nitrite and nitrate from freshwater aquariums. Completely rechargeable with Doc Wellfish's Aquarium Salt.

• 7.4 oz pouch in jar
• Treats up to 55 gallons