The Planted Tank Forum - View Single Post - Calculating CO2 when using Blackwater additives
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post #2 of (permalink) Old 08-05-2003, 11:37 PM Thread Starter
Algae Grower
Join Date: Jun 2003
Location: Springfield, Illinois, USA
Posts: 70
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This article talks about phosphate buffers throwing off the CO2 calculations, but does not say what to do if there are phosphate buffers in the water (for example from the water supply).

Also, it says nothing about tannic and humic acids, which are used in blackwater set-ups. I assume that any non-carbonate based buffer would throw off the pH-KH-CO2 relationship, but I have not been able to find anything for sure about this.
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