High orp

[Reefcube]

Lately my ORP has be going up to 450 even higher at night. What is a way to correct this. Ozone machine? I already use a co2 scrubber.

 

[LouieP]

Ozone typically increases ORP. If you don't run O3 I wouldn't worry about ORP & I would take the ORP probe off line.

If your ORP is that high without O3 its most likely a false reading caused by air bubbles or something growing on the probe.

 

[Error404]

I wouldn’t worry about ORP either , I have an ORP probe and it’s there to tell me if something very bad happens. Like someone poured something like bleach into the tank

 

[Randy Holmes-Farley Verified Community Expert]

ORP is never to high when not using oxidizers like ozone, permanganate, or tap water/chlorine, and nothing should ever be done to lower it if not using those. It also may not be accurate.