Boyu Cr-300 Aquarium Bio Ceramic System Ring For Fish Tank 300g

Feature: Suitable for fresh water, salt water fish tank. To fully exert biological filtration capacity of law porous filter ring. This product is mix made of the softy active carbon and ceramic. Chemically stable, fully in line with the original micro-organisms living chemical environment. High permeability, which can be aerobic nitrification and anaerobic denitrification, to make the water more stable, is the best biological filter material. Product Attributes: Material: Active carbon and ceramic Color: White Quantity: 1 Pcs Weight: about 300g in bag Outer diameter : 1.2cm/0.47inch Inside diameter : 0.4cm/0.16inch Height : 1.1cm/0.43inch Package Include: 1 x BOYU CR-300 Aquarium Bio Ceramic Ring Note: 1.Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid. 2.Please allow 1-5mm differences due to manual measurement.