Whats the differance? air stone w/ pump and co2 w/ diffuser - The Planted Tank Forum
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post #1 of 3 (permalink) Old 02-28-2008, 09:35 PM Thread Starter
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Whats the differance? air stone w/ pump and co2 w/ diffuser

Can someone explain how the reactor/diffuser setup for co2 operates and has differant effects than an airston with a pump?
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post #2 of 3 (permalink) Old 02-28-2008, 09:48 PM
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Two entirely different things.

The pump/stone agitates the surface of the water, which allows for increased gas exchange (O2, CO2, etc.).

A CO2 reactor/diffused increases the amount of time that the actual CO2 bubbles are suspended in the aquarium before they're lost at the surface.
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post #3 of 3 (permalink) Old 02-29-2008, 03:11 AM
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If your talking about a regular air pump, then yeah, its pumping AIR which is not all that high in CO2 levels, and it just bubbles to the top anyway, infact its the disturbance of the surface that causes gas exchange not the bubbles in the water. Those that inject CO2 are injecting pure CO2, not air. And good reactors or diffusers should mostly/fully dissolve the gas so that it does not bubble up to the top, like an air bubbler does.
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