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Re: ph, gravel, and filters
In a message dated 1/28/99 11:52:48 AM Mountain Standard Time,
pm_evans@yahoo.com writes:
> Lastly, the last test
> I did with the epoxy coated gravel was in a
> porcilin dish and the ph rose from around 6.0 to
> 7.2 in 24 hours.
The most likely cause I can think of for this rise is that the distilled water
has a very high level of CO2. Because the water was distilled the resultant
carbonic acid pushed the pH down easily. Then the CO2 dissipated, and the pH
rose aordingly. I'm not a chemist, so this is just a guess.
Bob Dixon
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