External refiner carbon dioxide atomizer bubble meter CO2 diffusion external barrel External refiner carbon dioxide atomizer bubble meter CO2 diffusion external barrel External Carbon Dioxide Diffuser:The external fineizer is a diffuser that efficiently distributes carbon dioxide (CO2) in your aquatic environment. Easy to Use:This product is designed for ease of use, making it a choice for both beginners and experienced aquarium enthusiasts. Versatile Application:Whether you're setting up a aquarium or looking to enhance the health of your existing aquatic environment. Compact and Portable:Its compact design makes it easy to place anywhere in your aquarium, while its portable nature allows for easy movement as needed. Durable Material:Constructed with durable materials, this CO2 diffuser is designed to withstand the demands of daily use.