API Bio-Chem Zorb for Filstar XP, Nexx & Rena SmartFilter Size 6 (1 Pack)
API Bio-Chem Zorb (formerly branded Rena Bio-Chem Zorb) is the most scientifically-advanced filter media available. Use Bio-Chem Zorb for sparkling clean water and healthy fish!
Bio-Chem Zorb is a blend of 2 research-grade scavenger resins, 2 pharmaceutical-grade ion-exchange resins and high porosity activated carbon in a convenient filter pouch.
Easy-to-use pouch works three to six months, change regularly for clean and clear water.