biOrb AIR Filter Cartridge Replacement, Activated Carbon Pre-Treated Filter for biOrb AIR 30 Terrariums, Prevents Odours & Stagnation, Easy to Replace Every 6 Months, Reliable Terrarium Filter Cartridge Activated Carbon for Clean Air: The filter cartridge features activated carbon, which absorbs impurities & odours, maintaining a healthy and breathable atmosphere inside your biOrb AIR. It’s designed to effectively circulate fresh air. Easy to Replace: This filter cartridge is simple to replace, making it hassle-free to maintain your biOrb AIR Terrarium. It’s designed to be user-friendly, so you can easily swap it out without any complicated procedures or tools. Recommended Replacement Every 6 Months: For optimal performance, the biOrb AIR Filter Cartridge should be replaced every six months. Regularly changing the filter helps your plants stay healthy and your terrarium environment fresh. Quality Trusted Around the World: Part of the OASE Group, biOrb blends expert engineering with elegant design. Known for innovation & reliability, biOrb products are trusted by aquarists around the world to support healthy, beautiful aquatic setups.