Fibst Co2 Diffuser For Aquarium, Excellent Co2 Solubility Ensuring Vigorous Plants (20Dx350L)

What You Get:1 x stainless steel CO2 diffuser1 x stainless steel fixture6-month warranty for ceramic sheet24-month warranty for other parts warranty and friendly customer servicePlease tighten the cup and soak it into water for more than 3 hours before transmitting carbon dioxide gas to it and adjusting the pressure to a appropriate level. It is normal if big bubbles appear when the diffuser begins to work. After 24 hours the bubbles will be smaller and the system will reach an optimal state.