-The pressure reducer reduces the cylinder pressure from approximately 60 bar (displayed on pressure gage 1) to a low 1.2 bar working pressure (displayed on pressure gauge 2) so that the CO2 supply can be easily regulated.

-Screw the pressure reducer onto the CO2 pressurised gas cylinder, connect the solenoid valve to the timer (not included) or CO2 control unit (not included) and regulate the amount of CO2 added using the fine needle valve.

-The pressure reducer fits disposable CO2 cylinders (U system) and refillable cylinders (M system). By unscrewing the knurled nut (W 21.8 x 1/14) with an Allen key, the pressure reducer fits the M10 x 1 thread of the disposable cylinders.

-Very high quality design: anodised aluminium, precisely CNC - milled in titanium colour, low noise solenoid valve. Reliable sealing washer instead of O ring.

-Package contents: 1 CO2 pressure reducer with 2 pressure gauges (for working and cylinder pressure) for refillable cylinders, solenoid valve and unscrewable adapter - then suitable for disposable CO2 cylinders.

Product Information

Easy to install

Screw the fitting onto the refillable or disposable CO2 cylinder. Use a hose to connect the hose connection from the permanently connected solenoid valve to the bubble counter/check valve and then to the diffuser/reactor in the aquarium. Adjust the number of CO2 bubbles on the fine needle valve. The CO2 permanent test provides feedback as to whether the amount of CO2 added is correct.

Night Switch-off/CO2 control:

The solenoid valve can either be switched on and off by a timer (not included) so that it switches on the light and the CO2 in the morning (and switches off again in the evening) or the solenoid valve is switched on and off by a CO2 control unit (JBL Proflora CO2 control) to regulate the CO2 supply and thus the pH value automatically.

Tip: Can easily be converted to a disposable cylinder system by unscrewing the knurled union nut with an Allen key.

Function of the pressure reducer (= pressure regulator): 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 approximately 1.2 bar. These 1.2 bar are then dosed by a small handwheel (fine needle valve) so precisely that individual CO2 bubbles can be counted in the bubble counter connected. The cylinder pressure and the working pressure are indicated on pressure gauges on this pressure reducer. These displays are not strictly necessary as unlike with diving cylinders with compressed air the cylinder pressure does not slowly drop, and you do not need to be warned when the cylinder is running low. Instead the pressure remains at its maximum pressure and then drops to zero in a very short time. So unfortunately there is no slow decrease of the cylinder filling pressure. The working pressure would only be important if it needed to be adjusted though this is normally not necessary.