ORP/Ozone/pH/Alkalinity, etc.

[Itchy Trigger]

My guess is that I had the generator on too high a setting. So that the level was rising quickly and once the target level was hit, even though the generator shut off, the burst of ozone caused ORP to rise further. I'll dial the level back so that next time the generator comes on, it's dosing even slower.

 

[Itchy Trigger]

ORP at 396. Generator still off. How high is this going to go and at what point do I get concerned?

 

[tmz]

There are a series of articles by Randy Farley regarding ozone . Just open the sitcky at the top of this forum on reef chemistry articles to find them. There is also a good one on ORP.


I don't know why it continues to rise . ORP is complex and reactions to ozone additions are complex . Bacterial activity on oxidized organics or ammonia oxidation might continue after dosing has stopped causing a rise among other things which could cause it. I'd start to be a bit concerned over 450 but if it goes that far with the ozone off. It could be an issue with the ORP probe.

 

[Itchy Trigger]

Thanks, Tom. It seems to be hovering around 396. I'll reread those articles Randy wrote - I did read them all back when I first started setting the ozone up. I have turned the level on the generator down quite a bit further so that when it does come back on, it will be adding ozone much more slowly. Not sure if that will help, but it seems worth a try.

 

[bertoni]

As long as the ozone is off, I wouldn't worry. I'm not sure why the ORP is still rising, but the probe might be re-equilibrating or the skimmer might still be removing organics.

 

[Itchy Trigger]

Got it. For what it's worth, ORP is now headed back down.