Tunze's CO Diffuser is a carbon dioxide distributor, used to introduce higher CO2 volumes into freshwater aquariums when little space is available. It is attached to the aquarium edge, up to a glass thickness of 15 mm (0.58 in.), with a magnetic holder and ensures a distribution of up to four CO2 bubbles per second. In the aquarium the diffuser operates as a “stand-alone” solution with a small submerged pump, which draws in the water and thoroughly mixes it with CO2. Dissolved CO2 only leaves the unit; no carbon dioxide is wasted. The diffuser is suitable for freshwater aquariums up to 1,000 liters (264 US gal.). 230V/50Hz (115V/60Hz), 5 W, cable 2 m (78.7 in.).