This external diffuser combines aluminium-alloy and glass components with an integrated bubble counter and check valve, offered for two hose sizes.
$66.00
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A CLOSER LOOK
An inline unit keeps the diffuser outside the main display and introduces CO2 through compatible filter plumbing. The bubble counter helps observe gas flow, but it is not a direct measurement of dissolved CO2 in the aquarium.
Explore the specificationsExternal installation leaves more of the display unobstructed.
A bubble counter provides a visual indication of gas flow.
Two options support different compatible plumbing setups.
No. It shows gas bubbles, not a direct concentration reading in the water.
No gas cylinder or pressure regulator is listed as included.
12/16mm External CO2 Diffuser & Reactor
Free economy shipping is available on all orders. Estimated delivery is 10–15 business days; timing can vary by destination.
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