Adding CO2 to the aquarium can be complicated, but with the right accessories it becomes relatively easy. Also when you need to attach multiple aquariums to one system, you can find everything you need here.
A CO2 pressure regulator is required to reduce the pressure in the CO2 bottle (approx. 50-60 bar) to a suitable working pressure (approx. 1-2 bar). This CO2 pressure regulator is suitable for use in combination with disposable CO2 bottles with a M10x1 thread. With the preset working pressure of 2 bar and only one rotary knob, it is easy to operate.