Dialing in CO2 injection by eye alone is guesswork — too little and plants stall, too much and fish stress out overnight. Dymax CO2 Bubble Counters let you actually count bubbles per second and confirm your regulator's output, rather than guessing at the flow.
Why a Bubble Counter Matters
CO2 injection needs to be dialed in precisely: enough to fuel healthy plant growth, but not so much that pH swings stress fish overnight when the CO2 solenoid typically runs. A bubble counter gives you a visual, countable reference point to set and monitor that rate.
Standard vs. Single-Ended
- Standard bubble counter — a two-port inline design that fits most CO2 setups running through standard tubing.
- Single-ended bubble counter — a simpler single-connection design for setups without room for a standard inline counter, or for keepers who prefer the more compact footprint.
How to Use One
- Position it where bubbles are easy to see and count consistently, typically just after the regulator's needle valve.
- Count bubbles per second and adjust the needle valve gradually, giving the tank time to respond before making further changes.
- Recheck periodically, since bubble rate can drift slightly with cylinder pressure changes over time.
Dymax CO2 Bubble Counters are available at Marine Concept Supply in Standard and Single-Ended designs — order online or pick up at our shop in Wheeling, IL. Shop the Standard Counter or Single-Ended Counter, and browse more CO2 & planted tank supplies.
