The Planted Tank Forum - View Single Post - CO2 Chart
Thread: CO2 Chart
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post #22 of (permalink) Old 08-31-2009, 06:30 AM
Algae Grower
Join Date: Jul 2009
Location: Saint Paul, MN
Posts: 61
I found these charts to be pretty inaccurate. I used it just before getting a drop checker and had a PH of 6.6 and a KH of 6.5 telling me I had over 70 ppm of Co2.

I then put in the drop checker and it read a slightly dark green which is about 20ppm of Co2. I turned up the Co2 a little bit and got it at 30 - 40 (lighter green) and boom the plants started pearling like crazy. Other tests have indicated this chart not reading out how my drop checker is reading. I trust my drop checker over this personally.
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