Up Aqua CO2 Acrylic Cylinder Diffuser – Large for 20-30 gallons aquariums – Designed for 20-30 gallon aquariums – Replacement ceramic disc – CO2 Diffuser Up Aqua’s Large Acrylic CO2 Diffuser is designed for 20-30 gallon aquariums. The replacement ceramic disc is UA-501 or UA145 for ordering purposes. Important Info: All ceramic discs, tubes, or surfaces MUST be soaked in water for at least 30 minutes before use. Warranty Info: All CO2 diffusers or atomizers are covered under a 90 day limited warranty.
