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Re: [APD] Hell Froze over-Redox probes and gas bubbles


Do you know how to explain O2 in the substrate? I don't use CO2 and never 
see pearling in this tank. What do you think is producing the oxygen?

Your response to the ORP probe question makes sense to me. Leave it in the 
area for enough time to eliminate the effect of the probe insertion. I'm 
used to taking a reading right away. Thanks.

Jerry Smith, Bloomingdale, NJ

>From: Raj <ggrk at blr_vsnl.net.in>
>Subject: Re: [APD] Hell Froze over-Redox probes and gas bubbles

>          Thats O2 bubbles. I have always seen this happen in my tanks
>for some 10 years. Sometimes huge bubbles burp out of the substrate.
>Burps take place after noon when O2 reaches saturation. It appears
>related to pearling..
>          About ORP, if a probe tip is buried for some hours or a  day
>should read near about the value.

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