ORP vs PH ?

[Chbix]

Is this a normal pattern? Seems almost identical (reversed though) in the pattern between my ORP and PH over the last 5 hours.

 

[Spare time]

I believe it is normal for them to travel in inverse directions. Randy has a great write up on orp if you wanna check it out

 

[Chbix]

I believe it is normal for them to travel in inverse directions. Randy has a great write up on orp if you wanna check it out

Thanks. Only had the apex for about 2 weeks and just noticed this in your face mirroring.

 

[taricha]

I believe it is normal for them to travel in inverse directions. Randy has a great write up on orp if you wanna check it out

yep.
ORP and the reef aquarium by Randy.
Check Figure 3. It shows the mirror image ORP / pH effect.

Curious @Chbix what did you add that caused the pH drop / ORP spike?