1. Stable Connection: The U - shaped connector can tightly connect the air pipe, ensuring that there is no air leakage when transporting gases such as carbon dioxide, and guaranteeing the stability and safety of gas transmission. 2. Good Adaptability: Specifically designed for CO2 diffusers, it can perfectly match various brands and models of CO2 diffusers, facilitating users to upgrade or transform existing aquarium equipment. 3. Optimize Gas Path: The design of the U - shaped tube helps to optimize the gas flow path in the aquarium, enabling gases such as carbon dioxide to be more reasonably distributed before being refined, improving the final diffusion effect.