Redox probe reading...

[redsea250]

Hi, I calibrated my redox probe yesterday, today more 16 hrs ,the reading is
-512 mv is this ok? is the probe still "adjusting" it self.? I tested the water paramiters and everything is great
Ammonia= o
nitrite= 0.1
Nitrate o.7
Ph=o
Calcium= 478
ph 0

 

[frank40]

i think it takes a few days to settle in, mine started with a reading of 312 but after a few days it has settled in the 440 range.

 

[redsea250]

i think it takes a few days to settle in, mine started with a reading of 312 but after a few days it has settled in the 440 range.

Hi, yes I understand that one, but my question is, why in the (minus) - range?

 

[redsea250]

Hi, I calibrated my redox probe yesterday, today more 16 hrs ,the reading is
-512 mv is this ok? is the probe still "adjusting" it self.? I tested the water paramiters and everything is great
Ammonia= o
nitrite= 0.1
Nitrate o.7
Ph= 8.4
Calcium= 478
phosphate= 0

 

[AQD_ottawa]

No, it has not claibrated correctly OR it is being influenced by a magnetic or electrical field

Calibrate it correctly using the Null plug and then put the probe in a jar of water away from the tank and test again.

 

[redsea250]

Ok, thank you.

 

[nanotank]

it took my probe 2 weeks to settle in with accurate readings...

 

[AQD_ottawa]

Yep thats normal, I did write once a guide about redox, no idea where it went, but one sentance synopsis is.

" a redox probe has to build up ions around the probe tip before it becomes accurate."

 

[redsea250]

My Redox probe need it to be re calibrated, after following your advice,(you said it wasn't calibrated proprely) the next
day it was 410mv. thanks for the help.

 

[AQD_ottawa]

good news.

It will need 2-4 weeks to become stable do not calibrate in this time.