Testing ORP

[Russ W]

Hi All,

Does anybody monitor or test their pond water ORP?

If so what kind of numbers do you get?

Do you do anything based on these readings?

Russ

[woodyaht]

I haven't started yet, but plan on buying a meter here shortly.


Numbers from what I remember reading should be in the area of 250-350. Maybe someone can confirm that????

[keokoi]

The numbers Chris has posted are Ideally where you want them.. Some strive Higher and use PP and or Ozone for high reading. RobR I know does a lot of tests and is into these gadgets. I have a meter I just startd to use. My water tests 310. Some meters need to be calibrated.


Joe

[GazKoi]

Hi Russ,

Yep i do test for ORP in fact i test for most things and my pond runs at around 300-330.

Do i do anything yes i keep and eye on how the pond is functioning and will tell me hoe polluted the water is with organic waste/material. The lower the reading the more organic waste is in the system which will normally increase the TDS levels. So if the level was to start dropping i would know that the filters would need cleaning.

i would also use this and think its a very important tool if you are to use PP in the system

[andy rose]

yeah i use one,

i do not fully trust the figure though ,mine reads at about 430 ish i read up to 450 was good .

some people use two meatures as they can be inaccurate so i take mine as a pinch of salt .

but when i first put it on it was at the same time as i started up a bakki shower and the figure shot up over night !

[GazKoi]

Hi Andy,

Is your battery powered????as when the battery is low or starting to degrade the reading does start to creep up.You can also get calibration fluids to check it out.

[Bob Hart]

430 Andy, are you sure.

Mine runs at 305-295 dependant on morning/evening (pH swing). I consider this to be a good reading, with very clean filters.

[jnorth]

I'm not even going to discuss my miserable readings....

[andy rose]

Sorry its taken so long to reply but i work very long hours,as i said before i do use one but i do not trust the reading,mine is made by american marine inc.

If you read koi kichi 2 it states that between 300 and 475 are the best figures, is my pond between these two i doubt it, but thats what the meter says!

I also own 2 hanna tds meters do i believe the figures nope, I take them with a pinch of salt.If i add up my gh and kh readings they do not match what the meter says.(i bought my second one last week) or are the gh and kh test kits out.

I also have lots of temperature gauges they also read differently which one is correct ?If i had an old fashioned mercury temp gauge i would be more inclined to believe that one though.

[andy rose]

oh yeah it does have a low battery power warning but that is ok at the moment