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Old 04-11-2004, 01:51 PM
Margolis
 
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"Michi Henning" wrote in message
...


Huh? Why would the table not be accurate when not adding CO2? The ratio
of pH/KH/CO2 is fixed by physical processes, whether CO2 is being added
or not. The only thing that can throw this out, as far as I know, is if

the
water
contains substantial amounts of non-carbonate buffer, such as phosphate.

But
that is not normally the case. Otherwise, the table is accurate, whether

you
inject CO2 or not.



It doesn't work properly if you are not adding co2 because it means that
there are other buffers at work if your ph is lower than it can naturally be
with a given kh. If you have a tank that has a kh of 4° with a ph of 7 you
would have 13ppm of co2 going by the charts. But in reality this cannot
happen under any circumstances unless you are adding co2. No matter what
your ph and kh are, your co2 is going to max out around 2ppm. That is why
I say the chart and calculations are only correct if you are adding extra
co2

--

Margolis
http://web.archive.org/web/200302152...qs/AGQ2FAQ.htm
http://www.unrealtower.org/faq