Das Brummen von Aquarien 1 mit einem Magnetventil 30 zur Steuerung des Einleitens eines Gases wird verhindert, wenn das Magnetventil 30 eine Spule hat, die über eine Diode mit einer Wechselspannungsquelle 70 verbunden ist und wenn parallel zu der Spule eine Freilaufdiode angeordnet ist.The aquarium (1) has a magnetic valve (30) for controlling carbon dioxide supply and comprising a coil to shift the magnetic valve against restoring force by producing reluctance force on a mobile anchor such that the magnetic valve is opened or closed. A flywheeling diode is switched parallel to the coil. The coil is connected with a voltage supply i.e. local alternating voltage system, by a diode such that the flywheeling diode and the diode exhibit transmission directions that are arranged against each other. The coil exhibits measured inductivity. An independent claim is also included for a method for controlling carbon dioxide supply to an aquarium.
