The Planted Tank Forum - View Single Post - Arduino Diy pH probe
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post #12 of (permalink) Old 01-28-2013, 05:01 AM
No more Bow ties
mistergreen's Avatar
Join Date: Dec 2006
Location: Cincinnati
Posts: 15,794
oh, gotcha. it costs the same to buy a CO2 sensor whose max is 36ppm
or a bit more ($250) for a sensor whose max is 300ppm.

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