Understanding ORP?

[Gilby]

i just need a little help understanding ORP. whats a good number? whats a bad number? maybe some good articles. Thanks

 

[Randy Holmes-Farley]

I do not believe there are good and bad numbers, aside from ridiculous numbers (say, less than 150-200 mv or above 550 mV).

I discuss it in detail here:

ORP and the Reef Aquarium
http://www.reefkeeping.com/issues/2003-12/rhf/feature/index.php

 

[wooden_reefer]

i just need a little help understanding ORP. whats a good number? whats a bad number? maybe some good articles. Thanks

There can be different ORP zones (micro-regions) within a tank. Where nitrification is active, the ORP will be high; where denitrification is active, it will be lower.

A solution that has more oxidising agents will have a high ORP. The most common oxidizing agent is oxygen, so oxygenated water tend to have high ORP. O3 is a stronger oxidizing agent than O2, so ozone raises ORP.

 

[KarlBob]

I do not believe there are good and bad numbers, aside from ridiculous numbers (say, less than 150-200 mv or above 550 mV).

I discuss it in detail here:

ORP and the Reef Aquarium
http://www.reefkeeping.com/issues/2003-12/rhf/feature/index.php

Wow. You said a mouthfull.

To the OP, I definitely think the above should count as a "good article".

 

[Randy Holmes-Farley]

Thanks.

Happy Reefing.