CO2 pressure reducer, pressure regulator for aquarium, aquarium with air bubble counter Precise adjustment of the amount of CO2: With the CO2 pressure reducer you can regulate the amount of CO2. CO2 measurement accurately and safely in no time at all. Precise adjustment of the number of bubbles: -The pressure valve: With the fine needle you have complete control over the number of needles. of CO2. The high-quality bubble counter enables regulation according to the number of bubbles per minute that is usual in aquariums. This means that plants can be optimally supplied with CO2 and grow beautifully. Monitoring: Thanks to the two powerful precision measuring devices, the pressure of CO2 in the bottle and the performance can be controlled easily and reliably. The bottle pressure shows when the CO2 has been used up. This means that the next filling can be optimally planned and CO2-free waiting times can be avoided. The pressure at the aquarium outlet also allows you to check the optimal