Features Ceramic media surrounds the filter cartridge at the bottom of the aquarium and is the key biological aspect of the filtration system.   The media’s honeycomb structure becomes populated with good bacteria that neutralises ammonia and nitrates from the fish.  ...

Features 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...