ORP and what do you do with info?

[Reefs anonymous]

What do you guys do with the ORP measurement on the APEX? What levels are considered "normal" and when out of that range, what do you do to correct it? Thx

 

[Bob Escher]

Well I look for mine to be higher than 235 or so.
But here the explanation from our resident chemist. He didn't say in the article a specific range is best but I know that generally higher is better but watch your PH at the same time

http://www.reefkeeping.com/issues/2003-12/rhf/feature/

 

[Reefs anonymous]

Well I look for mine to be higher than 235 or so.
But here the explanation from our resident chemist. He didn't say in the article a specific range is best but I know that generally higher is better but watch your PH at the same time

http://www.reefkeeping.com/issues/2003-12/rhf/feature/

Thanks for the info. I was in a little of panic because my reading is 130 but after reading the apex instructions, it states that the probe needs to be in the water for up to 2 weeks before reading the value. As far as a "normal" range. That document states

"So aquarists have to hope for, and to some extent maintain, this battle in a sort of middle ground. That middle ground is typically described as being between 200 and 500 mv. Most aquarium authors have recommended a range of 300-450 mV. Why? Mostly because the ocean often has ORP in this range, and because these authors have successfully operated aquaria in this range."

But the he states

"Nevertheless, I have not measured ORP in my aquarium for years, despite having the tools at hand. It is simply not very high on the list of things that one can usefully do to maintain a high quality reef aquarium, in my opinion."

 

[Bob Escher]

Thanks for the info. I was in a little of panic because my reading is 130 but after reading the apex instructions, it states that the probe needs to be in the water for up to 2 weeks before reading the value. As far as a "normal" range. That document states

"So aquarists have to hope for, and to some extent maintain, this battle in a sort of middle ground. That middle ground is typically described as being between 200 and 500 mv. Most aquarium authors have recommended a range of 300-450 mV. Why? Mostly because the ocean often has ORP in this range, and because these authors have successfully operated aquaria in this range."

But the he states

"Nevertheless, I have not measured ORP in my aquarium for years, despite having the tools at hand. It is simply not very high on the list of things that one can usefully do to maintain a high quality reef aquarium, in my opinion."

My changes from time to time I seen it as low as 180 but now that the tank is mature ( over a year) it stays between 265 and 335. Right now it's at 312

 

[DaveMorris]

The only reason why I have ever used an ORP probe was when I was running an ozone system on my tank. Ozone can raise your ORP quickly and can potentially raise it to unsafe levels. The ORP probe can help keep that in check.

 

[revhtree]

My ORP raises with nice clean water changes!

 

[dragon99]

My usually drops on a WC, probably because I'm stirring up sand or scrubbing rocks/glass.