The Planted Tank Forum - View Single Post - Playing "chicken" with DIY CO2 mix.....
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post #4 of (permalink) Old 03-20-2013, 12:36 AM
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Join Date: Jun 2004
Location: Baton Rouge, LA
Posts: 3,349
Don't forget the 4DKH solution for the drop checker either.

In the meantime, the old pH/kH method of testing CO2 levels, inaccurate as it might be, is perfectly good for detecting relative changes in levels - like the drop you'll be watching for.
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