Eheim Diffuser CO2SET 400 L

The CO² gas is atomized into many bubbles by the diffuser. The bubbles create a larger surface area for contact, allowing the CO² to dissolve quickly in the aquarium water. The bubble counter visually monitors the addition of CO². As a general rule, around 20 mg of CO² per litre is recommended. This is about 10 bubbles per minute for 100 litres of water.