The Planted Tank Forum - View Single Post - Affordable CO2 sensor?
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post #44 of (permalink) Old 11-17-2012, 11:13 PM Thread Starter
mistergreen
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Join Date: Dec 2006
Location: Cincinnati
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The tub of tap water bottoms out at 970 ppmv <- per volume.

I just stuck it in a non-co2 aquarium and I'm watching the co2 rise as I write.... seem to be at 1009+ ppmv now.
So there is EXTRA CO2 in a low tech tank after all.

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