Description
A glass bubble counter that lets you see and fine-tune your CO2 injection rate bubble-by-bubble, so you can deliver a consistent, precise dose to a planted tank.
Reading Your CO2 Rate With a Glass Bubble Counter
A bubble counter looks like a simple gadget, but it is one of the most useful feedback tools in a planted setup. By watching bubbles per second pass through the water column inside the glass, you get an at-a-glance sense of whether your injection has drifted overnight or after a refill. For local aquascapers running pressurised CO2 on Rotala-heavy layouts, that visual cue is often the first sign something has changed before plants or fish tell you the hard way.
Fill it with water or a touch of mineral oil, mount it inline after your solenoid, and use it together with a drop checker rather than instead of one. The bubble counter shows the rate; the drop checker shows the actual dissolved result. We always remind customers to fit a check valve too, so a power dip during a monsoon outage cannot siphon tank water back toward your regulator.
For the bigger picture, read our aquarium CO2 guide and our bubble counter guide. Find more CO2 hardware in our accessories.
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