Precise adjustment of the amount of CO2: With the CO2 pressure reducer you can adjust the amount of CO2 precisely and safely in no time at all. Precise adjustment of the number of bubbles: -The fine needle valve gives you complete control over the amount of CO2. The high-quality bubble counter enables regulation according to the number of bubbles per minute that is usual in the aquarium. This means that plants can be optimally supplied with CO2 and grow beautifully. Monitoring: Thanks to the two powerful precision pressure gauges, the CO2 pressure in the bottle and at the outlet can be easily and reliably monitored. The bottle pressure shows when the CO2 has been used up. This allows you to optimally plan the next filling and avoid waiting times without CO2. The pressure at the outlet of the aquarium also allows you to check the optimal water flow in the aquarium. High-quality materials and elegant design: The CO2 pressure reducer for aquariums is made of high-quality stainless steel.