New ACIII ORP Question

[ShallowWaters]

I just plugged in my new ACIII with temp, pH, and ORP probes. I kinda hate to ask this potentially silly question, but if my initial ORP reading is 027 does that mean the probe needs calibration or do I have a serious problem in my tank?

My corals are all generally healthy in a system with 300 gallons. But I am diagnosing some acro tip recession. Maybe I found the cause??!

I sometimes have a pH problem with my airtight house and after the initial reading, I opened my basement door and started running a very large air pump in my 100g sump. ORP rose to 130 over six hours.

Thanks

 

[kbecker]

It takes around a week or so for the ORP probe to stabilize

 

[ShallowWaters]

<a href=showthread.php?s=&postid=6669594#post6669594 target=_blank>Originally posted</a> by kbecker
It takes around a week or so for the ORP probe to stabilize

Oh, wow. How did I miss that? Do others agree with this issue?
Thanks kbecker.

 

[ShallowWaters]

Ahh, now that I know what to look for, I see this is a known issue.
Thanks again.