API Bio-Chem Zorb Filter Media Cleans and Clears Aquarium Water Size 6

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!Removes organic waste, toxic gases, water discoloration, foul odors and phenols in fresh and saltwater aquariums.Removes toxic heavy metals in freshwater.Bio-Chem Zorb will not release phosphates.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.Directions: Easy-to-use pouch works three to six months, change regularly for clean and clear water.Specifications:Size 6 - Can be used on any aquarium filter including the API XP Canister Filter up to 55 gallons.