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Re: Calculate CO2

Greger Lindstand wrote:

>I have forgotten how to calculate the CO2 concentration in the tank.
>Think it was something with GH or KH and the PH value.
>Can someone help with the formula?
>Which is the "ideal" level of CO2 in a planted tank?

Hi, Greger.  The formula is:

         CO2 = 3 x KH x 10^(7 - pH)

CO2 is in mg/L.

As for an ideal level of CO2, the recommendations I've seen range from 10 
to 30 mg/L.  I keep my well lit tanks around 20 - 25mg/L and get excellent 
Chuck Huffine
Knoxville, Tennessee