[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [APD] CO2 and pH control
It's a new probe that was calibrated a week ago and it's readings
correspond with 2 separate color tests.
Gordon
Laith Arif 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.
>
>Jerry Baker wrote:
>
>
>
>>Gordon and Susan Watkins wrote:
>>
>>
>>
>>
>>>The pH reading is coming from the sump of my trickle filter using a
>>>Milwaukee controller. Right now, with CO2 running, it shows 8.1. I
>>>checked another tank which has been set up continuously for over 25
>>>years and, using the same electrode, it showed 8.9. What else could
>>>account for the discrepancy?
>>>
>>>
>>>
>>>
>>You could have gravel or decorations which are buffering your pH. Things
>>like shells, coral, limestone, marble, etc. will do that.
>>
>>I intended to ask what is the pH of the tap water after it has sat out
>>for awhile (not in an aquarium).
>>
>>
>>
>>
>>
>
>
>
>_______________________________________________
>Aquatic-Plants mailing list
>Aquatic-Plants at actwin_com
>http://www.actwin.com/mailman/listinfo/aquatic-plants
>
>
>
_______________________________________________
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com
http://www.actwin.com/mailman/listinfo/aquatic-plants