Dymax CO2 Bubble Counter Dymax CO2 Bubble Counter is an acrylic bubble counter for monitoring the amount of CO2 being injected into an aquarium. It is useful for planted aquarium CO2 systems and can also be used on reef calcium reactor setups where visual CO2 bubble counting is needed. Simple Visual CO2 Monitoring for Planted Tanks A bubble counter gives aquarists a quick way to see whether CO2 is flowing and to make small needle-valve adjustments more consistently. By watching the bubble rate, planted-tank keepers can tune CO2 delivery more carefully than relying on regulator pressure alone. Acrylic Counter for Aquarium and Calcium Reactor Use Bubble counter for measuring visible CO2 injection rate. Made from acrylic material. Useful with most planted aquarium CO2 systems. Can be used with calcium reactors in reef aquarium setups. Helps make CO2 adjustments easier to observe. Compact accessory for CO2 line installation and monitoring. CO2 Line Placement and Compatibility Notes Product type: CO2 bubble counter. Material: Acrylic. Use: Planted aquarium CO2 systems and reef calcium reactor CO2 feed lines. Function: Visual bubble-rate monitoring. Best paired with: CO2 regulator, needle valve, tubing, check valve, diffuser, or calcium reactor as required by the system. Not a regulator, solenoid, diffuser, reactor, or CO2 cylinder. Installing and Reading the Bubble Counter Install the bubble counter inline on the CO2 feed line according to the direction of gas flow in the system. Fill the chamber with clean water or suitable bubble-counter fluid if required, then slowly open the CO2 supply and adjust the needle valve while watching the bubble rate. Check all tubing connections for leaks and use a proper check valve where backflow protection is needed. What's Included One Dymax CO2 Bubble Counter.