CO2 drop checker question - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 07-25-2010, 03:30 AM Thread Starter
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CO2 drop checker question

Hi, I bought this Dennerle CO2 drop checker from the LFS.

http://dennerle.com/global/index.php...id=152&lang=en

The instructions don't mention anything about putting in 4KH water. The first ampoule I put in remained a very dark green after 12 hours. The color did not match any of the reference colors.

I pipetted out the green indicator, and tried again with a different ampoule. Now its a very dark blue, almost black. Again, it doesn't match any of the reference colors on the chart.

Am I doing anything wrong?
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post #2 of 4 (permalink) Old 07-25-2010, 03:35 AM
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You need to put in some 4 degrees kH water. Sounds to me like all you have in there now is bromothymol blue.

-Chris

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post #3 of 4 (permalink) Old 07-25-2010, 03:40 AM
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That looks like that is a complete solution, including 4dKH and bromo... Sounds like you might not have enough co2 to see the color change!
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post #4 of 4 (permalink) Old 07-25-2010, 03:49 AM
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Oh yeah, looking back at the link the solution does look like it is too clear to be pure bromo. blue. Try increasing your CO2.

-Chris

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