[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: CO2 x Kh
At 03:51 AM 4/1/2003, Gustavo Adolfo Lapido Loureiro wrote:
>I´m intending to add CO2 to my tank, which has the following measurements:
>Ph - 6.8
>Kh - 3.0.
>Considering those measurements, I think that adding CO2 at this moment would
>produce a sudden drop in Ph, which is not a good thing.
>So, I´m thinking in, first, raising Kh (by adding some sea shells to the
>external filter) to a level of, say 5 or 6 degrees, and then adding the CO2.
>Now, I raise some questions:
>1 - Is the above strategy correct?
According to the pH/CO2 charts, you currently have 14 ppm of CO2 in your
tank. This means one of the following is true:
* You are already adding CO2
* Your tap water has a high CO2 level and you measured
the pH just after a water change
* You have non-carbonate buffers in your water. Have
you added pH adjustment chemicals?
* Your test kit is bad
In any case, 3 KH is just fine. You will not see a sudden drop in pH. KH
declines slowly due to biological processes, but normal water changes will
replace it. The only time you get a sudden drop is when KH is below 1 and
drifts toward 0.