The JBL ProFlora CO2 Regulator Basic offers pressure regulation of both JBL ProFlora U System and M System CO2 Cylinders. The Basic ProFlora CO2 Regulator offers easy dosing of CO2 in aquariums and also features an excess pressure safety valve. The safety valve ensures a safe release if the working pressure is set too high, without damaging the regulator. Easy to installScrew the JBL Pressure Regulator onto the refillable or disposable CO2 cylinder. Connect the Pressure Reducer via a hose to a bubble counter/check valve and then to the diffuser/reactor in the aquarium. Adjust the number of CO2 bubbles on the fine needle valve. Use a CO2 permanent test to provide feedback as to whether the correct amount of CO2 is added. Safe to useThe ProFlora CO2 Regulator is equipped with a safety relief valve, which provides a safe release of working pressure (in case it has been set too high) without damaging the fitting. The diaphragm control of the pressure reducer guarantees absolute reliability. Function of the pressure reducer:To reduce the pressure from the pressurised gas cylinder, a pressure reducer is screwed on. It reduces the 50-60 bar cylinder pressure to a working pressure of approx. 1.5 bar. This 1.5 bar is then dosed by a small handwheel (fine needle valve) so precisely that individual CO2 bubbles can be seen and counted in the connected bubble counter.