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The CO2 is in a storage cylinder which always needs to be kept in an upright position, since CO2 is liquefied under pressure. To keep the gas well dosed while inserting it into the aquarium, screw the pressure reducer on the storage cylinder. It reduces the cylinder pressure so that you are able to adjust the CO2 supply to an exact quantity of bubbles with a small handwheel. The CO2 reaches from the pressure reducer over a CO2 resistant hose to a bubble counter, which at the same time serves as check valve ( JBL ProFlora CO2 Count Safe ). In the bubble is water in which the CO2 bubbles rise and become visible. Now you can adjust the desired bubble count with the handwheel. The integrated check valve prevents a backflow of the water into the pressure reducer and storage cylinder. The CO2 hose transports the carbon dioxide from the pressure reducer into your aquarium where it needs to dissolve as quickly and uniformly as possible in the water. For this various diffusers are available, depending on the size of your aquarium. In the diffuser the CO2 comes in contact with the aquarium water where it dissolves. A permanent test indicates how much water has been dissolved and whether this is the right amount.
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