ORP range?

[carbene]

I find that my orp level drops If something died in the tank. The bigger the droppped, the bigger the dead fish/snail

 

[joaocdestro]

When Lower than 270, it means a problem on my reef. My last problem was excess of biopellet reactor, after shut down ORP increased daily.

 

[ctcarper]

Avg is 400 for me. It will fluctuate (be the inverse) of PH.

 

[NoVA Jackets]

Don’t worry, it often takes a couple of weeks to achieve constant levels. Mine started low as well and over a month gradually reached 400 or so. The tank was 2 years old at that time. It runs at 380 - 410 very consistently. If I wash equipment with peroxide and rinse extensively prior to returning to the tank, ORP immediately falls to 250 or so then returns to 400 within a couple of hours. I do a 20% water change once a month which has essentially no effect on ORP.

My tank is only a few months old. I believe it started below 200. It recently stabilized to about 370:

 

[Veteran Reefer]

My tank average is about 260.

 

[1_hopeless_reefer]

Fluctuating but here is my apex

 

[1_hopeless_reefer]

Hi all I am going to run ozone in my reef tank , I was just wondering what is the right level for orp to be set at on my controller is it 200 or 400 been reading the last thew comments above , so any pointers please would be great

Between 350-450