Re: [APD] KH question

[Vaughn Hopkins <hoppycalif at yahoo_com>]

Where I live now my tap water has KH below 1.  I don't add anything  
to "buffer" it.  I use 40 ppm of CO2 in the tank, and the pH hasn't  
changed enough to cause either the fish, shrimp or plants to complain.

Incidentally, to buffer a solution requires adding a substance that  
resists increases in pH and a substance that resists decreases in pH  
- always two substances.  Adding just one, like bicarbonates, only  
shifts the pH higher, it does not buffer the solution to a specific pH.

I just felt a need to be pedantic there.  Sorry.

VaughnH.

On Nov 19, 2006, at 10:20 AM, Liz Wilhite wrote:

> I moved recently and went from tapwater with a KH of 9 to tapwater  
> with a KH
> of 2.  The KH in the tank with aragonite is about 6, but the Eco- 
> Complete
> tank is running about 3.  I am just getting my CO2 up and running  
> again and
> I have a question:  with a KH of 3 do I run a risk of the pH  
> crashing?  If I
> need to raise the KH, could I expect to see a consistent, stable KH  
> level if
> I added a bit of crushed coral to the canister filter?
>
> Thanks.
> -- 
> Liz
>

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