CO2 Bubble Counter With 2m Pipe, Suction Cup And Check Valve

A bubble counter allows you to monitor the rate of CO2 entering your aquarium. It is an external piece of equipment that should be added in-line to your filter tubing. Whilst adjusting your regulator, you can use the bubble counter to count the bubbles entering your aquarium one by one.

Check valve, also known as a non-return valve or a stopper valve, will allow air to flow from the pump to the connected device(s) but will not allow air, and more importantly, water, to flow back towards the pump.