Fluval CO₂ Ceramic Diffuser (Mini 20) – A small CO₂ diffuser designed for Fluval’s Bio CO₂ kit and similar DIY CO₂ systems. It features a fine-pore ceramic disk that disperses carbon dioxide into ultra-fine bubbles for better dissolution in aquarium water. This efficient diffusion increases CO₂ availability for aquatic plants, improving their growth and vigor. Suction cups allow easy placement in the tank, ensuring optimal CO₂ distribution in your planted aquarium.