*This product is capable of refinement and carbon dioxide efficient diffusion of carbon dioxide glass refinement device. Simple and unique shape of the tank increases highlights， ideal for parties cylinder fishbowl. CO2 Music Glass is a glass CO2 diffuser that diffuses CO2 efficiently in water. Its simple design adds a delightful look to an aquarium. Please select the right size for your aquarium tank. Once the diffusing filter gets dirty， please clean up with Superge for glass cleaning solution.