Nishikigoi International: Re: Proper use of ORP meters

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Re: Proper use of ORP meters

Posted by Michael Anderson (MCA) on 3/1/2008, 1:03 pm, in reply to "Re: Proper use of ORP meters"
24.126.161.84

might be of interst...

Items that Impact ORP Readings
There are several factors that will change the ORP level of the pond water.
• Organic Load: The most obvious thing that will change the ORP readings is the absence or presence of organic pollution. After all, for most of us hobbyists, this is one of the key reasons we purchased and use an ORP meter.
• Dissolved Oxygen: Remember how we said that originally ORP was thought of as the adding or removing or oxygen to another substance. That is because if we increase the dissolved oxygen levels in the pond, the ORP values will go up. This is one of the reasons folks always hear me preaching for more aeration.
• pH: ORP move inversely with pH changes. If the pH drops, the ORP levels go up. Bring up the pH, the ORP levels decrease. Here is a hint, if your pond ORP is 400mv or higher and there is no oxidizing chemical present, double check the water pH. It might be lower than you think it is and lower than you want it to be.
• Calibrated Meter: Sounds like a no-brainer. But you need a meter that has been calibrated and has good batteries, or an AC adapter. An uncalibrated meter might be more dangerous than no meter at all if you are using the meter readings to dose oxidizing chemicals.

Re: Proper use of ORP meters - James P 3/1/2008, 1:17 pm
- Re: Proper use of ORP meters - john stevens 3/4/2008, 7:46 pm
- Re: Proper use of ORP meters - Roger L 3/1/2008, 3:29 pm
  - Re: Proper use of ORP meters - James P 3/2/2008, 1:14 pm
  - Re: Proper use of ORP meters - Michael Anderson 3/1/2008, 5:02 pm
    - Re: Proper use of ORP meters - Gazza 3/8/2008, 4:49 pm

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