CO2-Diffuser The CO2 gas is atomized into many bubbles by the diffuser. The bubbles create a larger contact surface enabling the CO2 to dissolve quickly in the aquarium water. The bubble counter visually controls the dosing of the CO2. As a rough rule of thumb: approx. 20 mg CO2 per litre. This corresponds to about 10 bubbles per minute per 100 litres of water. EHEIM CO2-diffuser 400 for small and medium aquariums up to 400 l Small, effective device with an integrated bubble counter and non-return valve.  Easy to connect and attach to the aquarium pane with suction holder.  Advantages: Small, space-saving device Highly efficient diffuser Bubble counter for visual control of CO2 dosing Non-return valve prevents water returning to the CO2 system Hose protection Powerful suction holder

The CO2 gas is atomized into many bubbles by the diffuser. The bubbles create a larger contact surface enabling the CO2 to dissolve quickly in the aquarium water. The bubble counter visually controls the dosing of the CO2. As a rough rule of thumb: approx. 20 mg CO2 per litre. This corresponds to about 10 bubbles per minute per 100 litres of water.EHEIM CO2-diffuser 600 for larger aquariums up to 600 lQuality glass CO2 diffuser with separate bubble counter and safe non-return valve for effective and loss-free CO2 dosing.The large diffuser area ensures optimum and effective distribution of CO2 bubbles in large aquariums. Space-saving corner mounting with two powerful suction holders.Advantages:   User-friendly device with large diffuser area Optimum distribution of CO2 bubbles in large aquariums Separate bubble counter for visual control of CO2 dosing Integrated non-return valve prevents water returning to the CO2 system Safe hose connection Space-saving corner mounting with two powerful suction holders

EHEIM CO2 - Accessories for healthy plant growth in the aquarium Our guarantee to you: Original EHEIM accessories and spare parts are extensively tested, reliable and of the highest quality.