What is your ORP

[sailfish]

I know that ORP is subjective and somewhat controversial but I recently have been able to monitor it with my Apex. I do not plan to use Ozone but wondered what others ORP reading were.

Here is a link for other on ORP.

http://reefkeeping.com/issues/2003-12/rhf/feature/index.php">http://reefkeeping.com/issues/2003-12/rhf/feature/index.php</a>

Thanks Joe

 

[sailfish]

Thanks Charlie mine seems to go between 315 to 335 and hit a peak of 343 today.

Joe

 

[tgray3]

Mine runs between 280 and 320 with no ozone.

 

[oz]

You saw mine, right around 300. Like I said, I wouldn't chase a number. I believe the ideal Ozone amount is what it takes to keep your water crystal clear (void of the normal green tint if you put it in a white bucket). That's the gauge I use. I also have the ozonator set to 320 shut off and my AC3 to shut it down via 2nd ORP probe at 350 just in case.

 

[bobz]

Mine is between 330 and 345, 343 right now. I'm not using Ozone either and I only monitor it because I have the RKE. But I do take note if it starts to drop to see if there is something amiss in the system.

 

[dkelly]

averages around 350

 

[sailfish]

Well after Jeremy said that the probe needs to be 6" away from the PH probe I moved mine and it seems to be 380 to 410 now. It had been hanging around 365 to 380. I do not plan on using it for anything specific except to monitor for dramatic changes like BOB mentioned.

I will note that I need to calibrate it as it did not come with a solution. I figure it's not so important what the number is as a watching out for large or abnormal changes. I did want to see what everyone else was so thanks for the info.

Hey its about the only thing new the Apex controller can do that I could not before.

Joe

 

[schwaggs]

Whether the probe comes in solution or not makes no impact on whether it needs to be calibrated or not. pH probes are "porous" which is required for proper operation. If they dry out, some of this ability is lost which is why they are shipped in solution. ORP probes are not sensitive to drying out that way.

If you are using your ORP probe to monitor for trends and dramatic changes, there is no reason to calibrate it.

You must calibrate the pH probe frequently to maintain accuracy. It is common for them to be .1 or more off after a short time (on the order of weeks). Before you make any changes to your tank to raise or lower your pH (if you choose to), you should calibrate your probe to make sure it has not drifted out of calibration.

 

[sailfish]

Thanks for the info it came in a little cap with a solution but did not have a calibration solution. It said it had been calibrated at the factory. The funny things is it was 177 the night I first put it in and went to the low 300 within 24hrs. It seemed to settle in around 375 but seems to have moved up a little after I moved it.

Dam I guess Jeremy was right.:yuk: It could be something else though.

I will probably order a solution for the heck of it but I am in no rush. Thanks for the info.

Joe

Schwaggs;387641 wrote: Whether the probe comes in solution or not makes no impact on whether it needs to be calibrated or not. pH probes are "porous" which is required for proper operation. If they dry out, some of this ability is lost which is why they are shipped in solution. ORP probes are not sensitive to drying out that way.

If you are using your ORP probe to monitor for trends and dramatic changes, there is no reason to calibrate it.

You must calibrate the pH probe frequently to maintain accuracy. It is common for them to be .1 or more off after a short time (on the order of weeks). Before you make any changes to your tank to raise or lower your pH (if you choose to), you should calibrate your probe to make sure it has not drifted out of calibration.