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Re: pH, KH, CO2

> From: "Rachel Sandage" <rachelsor at hotmail_com>
> Subject: Re: pH-KH-CO2 
> I am also suspecting that my pH test kit could be funky - I just bought it, 
> it's an AQ pharm.

	The pH test kits are usually pretty foolproof, just one well-known
indicator.  It doesn't go off.

> I was thinking of taking a water sample into the lfs and 
> having them test it, to see if it is my test kit. The lfs is 45 minutes 
> (longer, if traffic is at all bad) from my house - will the pH change in the 
> course of that drive as CO2 will no longer be being added?

	With CO2 injection into my tank, I find that the pH changes within
20 _seconds_ of taking the sample.  That is for a small (a few mL) sample in
a test tube.

Paul Sears        Ottawa, Canada