Low orp reading with apex

[Themako1]

So my tank is about finished cycling and I'm getting stabilized readings of around 170 with the orp probe. The apex has been setup for a couple weeks now, so my question is should I care about this value from now? Does it mean bad water?

 

[Randy Holmes-Farley]

No, I'd just ignore ORP unless using ozone. It is not any indication of the health of the tank, IMO.

I discuss it here:

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