100% brand new high quality Bio Ball Bio Ball aquarium filter. Each ball features plastic construction and high performance filler. Black Bio-Balls have a dense pore structure that harbors many nitrobacteria. 35 filter biospheres of 26 mm + 15 x 20 cm / 2 aquarium filter mesh bags, ideal for oxygenating the water and promote the gas exchange process. Perfect for any fresh or saltwater aquarium or mini reef aquarium.
