Billion Bacteria Rings Big size Filter Media 50 Pieces Box

Billion Bacteria Rings Big size Filter Media 50 Pieces Box Perfect for Salt Water & Freshwater. Trickle filter sample setup for marine or koi ponds with added ceramic breathing bars. Heat Processed ceramic Marco rings. 3-4 rings can be glued and made up as fish hiding. Best suitable for all types of aquarium filters. 100% natural ceramic clay. Heated to 1300°C. Total 50 pieces in 1 Box Each piece diameter is 4.5cm Each piece height is 2.5cm