is a carbon dioxide distributor, used to introduce higher CO2 volumes into fresh-water aquariums when little space is available. By means of a universal magnet holder it is attached directly on the margin of the aquarium 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 aquariums up to 1,000 litres (264 USgal.) of fresh water.