The pressure reducer plays a vital role in aquaria. The quality of the pressure reducer determines whether exact and reliable CO2 fertilisation can be guaranteed. The new Carbo range from Dennerle represents the state of the art in CO2 technology, combining simple operation with high precision and reliability.Dennerle CO2 Precision Pressure Reducer Carbo Night+ Only 1 setting knob for simple operation+ Dynamic Valve Control (DVC) for constant number of bubbles+ Automatic pressure compensation during adjustment for swift and precise setting+ High-strength aluminium alloy construction results in low weight+ Automatic pressure relief+ Cylinder thread with safety vent+ Internal fine filter for high level of operational safety and reliability+ the first aquarium pressure reducer with integrated solenoid valve+ simple and accurate bubble setting+ with integrated night shut-off+ visual indication of control state by blue LED+ for use with Dennerle disposable cylinders+ also suitable for dispo