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.
The CO2 supply in the aquarium can be switched off with the solenoid valve – for example to regulate the pH or at night. This solenoid valve has been specially developed for the EHEIM LEDcontrol+ lighting control system and EHEIM pHcontrol+e.