Orp reading?

[garys reef]

What should the ORP reading be my reefkeeper says -487 and i have know idea where it should be i calibrated it a few days ago

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[fishman1069]

Are you running an ozone generator? Im pretty sure ypi don't have to worry about ORP unless you're running one

 

[garys reef]

no im not running an ozone generator had the port on the reef keeper and secided to hook one up and see just dont know what im looking at now lmfao

 

[h2o]

I got the orp probe on my apex it stays around 350 i been asking to see what the reading should be in a reef tank but theres not much info on it , i read some place that in the ocean its between 400-500 also read that messing around with ozone can bleach your tank quick so i just let it be for now hoping i find some real info soon

 

[garys reef]

mine is reading minus 487 -487

 

[albano]

mine is reading minus 487 -487

IMO that reading is wrong, not sure if minus 487 is even possible...

I like to see 400+ on my tank, but it sometimes goes down to 300

 

[garys reef]

maybe im calling digatl aquatics cause mine has a - sign before the reading the tank looks normal i should have left it alone now i have another thing to worry about lmao

 

[garys reef]

it goes up and down today it hit -567 maybe its the probe

 

[MIKE NY]

I would check your probe and clean it if you haven't already..never heard of a minus number and to be honest in the twenty two years I've had my tank running I don't think I ever checked the ORP because I never ran ozone, but here is some good reading on the subject....
http://reefkeeping.com/issues/2003-12/rhf/feature/index.php

 

[ReefnQueens]

Oh someone like me...lol oh what's that , let me buy it and see what it does....I bought one for the apex just because.....when my Sps tank was just Sps it ran around 300-350 , once I broke down my nano and put all my softies in there it shot up after a few days to about 400-470 because of the gases that the softies give off......your probably reading normal but for some reason u have a minus sign

 

[strgazr27]

I show -486 but that is likely because I don't have a probe attached. Unless your using ozone as Al said its really not needed...

 

[garys reef]

just another toy lol

 

[MikeC]

This sais allot from the Reefkeeping article

"Most reef aquarists, aside from those that use ozone and must therefore monitor ORP to prevent overdosing, use ORP to monitor if anything unusual happens in the aquarium. A sudden drop in ORP, for example, suggests that the reducers are suddenly gaining ground. That might be because a gush of organic molecules has been released from a dead organism, or because the oxygen supply is not keeping up with demand for some reason. Aquarists might use such information like an alarm suggesting the tank needs to be looked at closely. Most aquarists do not target any specific ORP value as being optimal, in part because ORP measurement is subject to considerable potential error."

 

[allenjj]

Orp

Like Mike said, I use my ORP reading to generally monitoring how the tank is doing. My ORP generally runs between 390 and 435. It dropped below 200 once when my macro algae in the refugium went aysexual and depleted the oxygen from the tank. Generally when my ORP starts dropping I know it is time for a water change. Hope that helps.