In plant aquariums, a bubble counter is an important technical component in the CO2 supply of aquatic plants by means of a CO2 system. With the help of the bubble counter, the amount of CO2 introduced into the aquarium is monitored. The CO2 gas is passed through a hose into the aquarium tank, to which the bubble counter is connected at one point. A bubble counter is usually a small vessel that is filled with water. The CO2 entering on one side has to pass through the water - which it does as a bubble. On the other side of the bubble counter, the gas continues its way towards the diffuser inside the aquarium. The number of bubbles is measured during a certain time unit (for example, per minute or per second), giving the aquarist a certain value to calculate with, enabling him to monitor the amount of CO2 introduced for comparison with the recommendations.
Bubble counters made from various materials, such as plastic, stainless steel, aluminum or glass are available in our online shop. Especially the models made of glass are very popular in aquascaping. Bubble counters are often attached to an aquarium pane from the outside with suction cups. That way, the aquarist always has the bubble frequency in view. By the way: in cases of very high frequencies of one or more bubbles per second, or when used for larger aquarium tanks, we recommend bubble counters, in which the bubbles will have to climb up "stairs" - as is the case with the Aquasabi CO2 Counter Japan Style. Due to the longer distance the bubbles will have to travel, it is easier to count them.
If CO2 dispensers like inline atomizers are used, which need a very high operating pressure, it needs to be seen to, that the bubble counter is designed for and can take higher pressures.
Filling bubble counters with water is sometimes a cumbersome, especially for newcomers to aquaristics. We have explained how to do it in an article in our Aquascaping Wiki in more detail.