What is your ORP

JOKER · Mar 22, 2014

Well my ORP probe has finally settled in. I running right around 350 peak. I think that is a reasonable number. I am due a water change so would it possibly go up with water change? What are most of you seeing with the ORP readings?

MatteZ · Mar 22, 2014

373. When I dose peroxide it crashes to half that if not more. Then it comes back up. I stopped paying attention to it. The only time I really loom is when the tank looks funny to me.

cee · Mar 22, 2014

Waaaay back when I used to monitor ORP but never saw a correlation between tank health and ORP. Same with pH, stopped monitoring that many years ago. Alk pretty much tells the story to me now. I can almost tell you what the dKh is without doing the test now based on the appearance of the tank.

fishdoc11 · Mar 22, 2014

I never have payed attention to ORP. When I took down my last tank I only measured calcium and alk (I do like to run a pH probe just to watch for something disastrous). Once a tank is dialed in and you have some time under your belt you can tell just by looking at the tank if something is off.

JOKER · Mar 23, 2014

I totally agree on watching the tank!!! I change my carbon when I see the zoas not opening.

fishdoc11 · Mar 23, 2014

JOKER said:
I totally agree on watching the tank!!! I change my carbon when I see the zoas not opening.

Good idea, I'm assuming that seems to helps?I have a harder time with them than any other corals besides rics. They do well for months or years and then some of them with inevitably start closing up/melting.

Boboli · Mar 23, 2014

Boboli · Mar 23, 2014

The low 390 area was a water change yesterday.

JOKER · Mar 23, 2014

It does help but the tank is not to the 1 year mark yet so keeping fingers crossed. So far so good!!

mrsaltwatertank · Mar 23, 2014

The ORP reading is not what to pay attention to. The upward or downward trend is what to watch

Dowtish · Mar 23, 2014

mine has been the exact same number since I hooked up my apex. Its the most stable thing on my tank...

The fact that I dont have the actual probe is probably why. :rofl:

I dont think I'll ever watch this parameter or buy the probe.

JOKER · Mar 23, 2014

LOL. Mine was stable until I got the probe. I just wanted something else to track.

JOKER · Mar 23, 2014

Aside from the normal fluctuations with feeding and water change, how much of a downward trend would be too much?? I notice mine trends down when lights come on.

mrsaltwatertank said:
The ORP reading is not what to pay attention to. The upward or downward trend is what to watch

mrsaltwatertank · Mar 23, 2014

JOKER said:
Aside from the normal fluctuations with feeding and water change, how much of a downward trend would be too much?? I notice mine trends down when lights come on.

There are no accepted numbers for the trend. I always look at trends to see what the normal rise/fall during the day and week is, then use that as a baseline.