RE: Reconstituting RO/DI Water/ RO Water comes in at 5.5pH

[Randy Carey <carey@spacestar.net>]

As a support for this statement, my r/o water usual reads from 5.5 to 5.9 
after I've gathered it in a holding tank.  As I said earlier, my unit 
leaves enough in the water to have a conductivity of about 20µ -- enough, I 
assume, to get a relatively close reading with my probe.

--Randy

At 12:43 PM 3/25/2002, you wrote:
> _Pure_ water has a pH of 7.0.  But that's an extremely difficult
> measurement, and almost irrelevant for fish-keeping ('cuz anthing else in
> the water will change it).
>
> Breathe on it, and you'll lower the pH... to about 5.5, which is the pH
> you'll get with atmospheric CO2 dissolved in it ;)
>
> michael kahlow


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