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Re: [APD] CO2 and pH control



This is the question that should have been asked first. I suspect the
readings are off..

Raj

At 13/12/05, you wrote:
>When was the last time you calibrated your pH probe?  Try to use another
>method to test your pH to double check it.
>
>Laith
>
>
>-----Original Message-----
>From: Gordon and Susan Watkins [mailto:gwatkins at ritternet_com]
>Sent: 12 December 2005 19:38
>To: aquatic plants digest
>Subject: Re: [APD] CO2 and pH control
>
>My resting tap water now shows 8.6. I'm not sure why I previously tested
>at 9.3. My tank has a laterite sublayer with "inert" aquarium gravel on
>top. Decorations are petrified wood. Trickle filter has a floss
>prefilter and bioballs.

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