Oase - biOrb biOrb Pearl Media

 biOrb Pearl Media A smooth biological filter media. Especially suited to fish that feed at the bottom of the aquarium. The pearls provide a home for beneficial bacteria. The bacteria activates the biological filtration within your aquarium, providing clear, healthy water. Pearl media will not alter the water pH and is suitable for all aquariums, including marine. Each pearl is between 10-12mm diameter