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Water Quality using ORP readings

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Water Quality using ORP readings

Post by DaveB on Sun Oct 30, 2011 10:19 pm

using the forumula (R2H=ORP +205 divided by29.58) +2p.H.
R2H=345+205/29.58+2x7.28
=32.96
I understand anything over 32 is what to go for. Do any of you guys use this R2H when treating pond with pp. therefore allowing for P.H. differences, and if so what R2H to keep for 4 hours.If my memory serves me correctly R2H=40 but not sure if there is any update on this

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Re: Water Quality using ORP readings

Post by Admin on Sun Oct 30, 2011 10:30 pm

DaveB wrote:using the forumula (R2H=ORP +205 divided by29.58) +2p.H.
R2H=345+205/29.58+2x7.28
=32.96
I understand anything over 32 is what to go for. Do any of you guys use this R2H when treating pond with pp. therefore allowing for P.H. differences, and if so what R2H to keep for 4 hours.If my memory serves me correctly R2H=40 but not sure if there is any update on this

Dave it would depend upon the ppm of Potassium Permanganate at any given RH2 figure.

2 ppm for 4 hrs is considered sufficient for eradicating parasites.

Oxidizers perform more efficiently at lower PH ....

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Re: Water Quality using ORP readings

Post by DaveB on Mon Oct 31, 2011 12:13 am

In that case it would be safer to use the R2H fugure rather than going for a particular ORP reading or putting 2ppm PP in as a standard dosage which I have done in the past. I can generally get a 4 hour purple with only 1.5 mg dosage, Which gives me an ORP of 530. In some peoples eyes this would be too much, however If I were to take the R2H figure at my p.H this gives me an ORP of 547. Hope this makes sense

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Re: Water Quality using ORP readings

Post by Admin on Mon Oct 31, 2011 12:41 am

DaveB wrote: In that case it would be safer to use the R2H fugure rather than going for a particular ORP reading or putting 2ppm PP in as a standard dosage which I have done in the past. I can generally get a 4 hour purple with only 1.5 mg dosage, Which gives me an ORP of 530. In some peoples eyes this would be too much, however If I were to take the R2H figure at my p.H this gives me an ORP of 547. Hope this makes sense

1.5ppm for four hours has worked if an outbreak is not `Epizootic` Dave.

Did you gauge your RH2 values when dosing 2ppm ? If so what were they ?

I run 500-550 ORP mv routinely when dosing PP now.

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Re: Water Quality using ORP readings

Post by DaveB on Mon Oct 31, 2011 1:32 am

when using R2H values for treatng for parasites I have always used Stephens number in the past of which is 40. This gives me an ORP of approximately 547.at my current p.HHowever I initially add 1.5mg/l of pp which would gives me 530 and keep adding until I get 550 I then maintain this for 4 hours. However in the end it probably works out to be round about 2ppm, sometimes more depending upon organic loading at the time. Hope this makes sense

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Re: Water Quality using ORP readings

Post by Admin on Mon Oct 31, 2011 2:05 am

DaveB wrote:when using R2H values for treatng for parasites I have always used Stephens number in the past of which is 40. This gives me an ORP of approximately 547.at my current p.HHowever I initially add 1.5mg/l of pp which would gives me 530 and keep adding until I get 550 I then maintain this for 4 hours. However in the end it probably works out to be round about 2ppm, sometimes more depending upon organic loading at the time. Hope this makes sense

Yep...

It makes sense Dave Smile

That used to be the way I dosed PP too Cool since acquiring the sensafe photometer though I will probably try to maintain either 1.5 or 2ppm PP for a minimum or 4 hours (I have done 5 hours in the past @ 1.5ppm) should I ever need to treat again.

As stated previously ... the lower the PH the more ` effective` the Oxizider Anti-Bacterial/Paracidal properties are ...

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blast-from-the-past !

Post by Admin on Mon Oct 31, 2011 5:57 am

Remember this Dave ? Very Happy



It featured in the first RH2 thread posted in a UK Koi Forum ... and followed Stephen`s original thread at KP.

Patch consented to me using his Pic above for that thread and stated the Lake Water PH value measured 5-ish Shocked

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Re: Water Quality using ORP readings

Post by DaveB on Mon Oct 31, 2011 5:48 pm

Mio My memory is not what it use to be,can,t remember the photo but do remmember the lake water having a very low p.H. perhaps you could link us up, if it is still open for viewing

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Re: Water Quality using ORP readings

Post by Admin on Mon Oct 31, 2011 8:31 pm

The Original Thread by Patch was posted on KP Arrow

http://www.koiphen.com/forums/showthread.php?87854-Now-this-is-SOFT-water-...&s=9557a0dd60a232fe862125da773a244a?s=9557a0dd60a232fe862125da773a244a

The UK Koi Forum I posted it on has closed very sadly since Sad which both you and I took part in.

Patch did not test the ORP mv value of said Lake ? BUT if we apply Roddy`s Lab results then 600+ mv ORP would not be remarkable Shocked

Drop the pH to 5.3 with drops of HCl and the ORP increased on average to 635

http://www.koiphen.com/forums/showthread.php?109796-The-Official-Koiphen-quot-The-Effects-of-pH-on-ORP-Readings-quot-Thread/page2

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Re: Water Quality using ORP readings

Post by DaveB on Tue Nov 01, 2011 2:31 am

Hi Mio thanks for the origonal links which were most interesting. I too believed that green water was healthy for koi, but now wonder about the huge p.H swings associated with it, not to mention if there is any die off causing a drop in D.O. as it decompses. Your thoughts please

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Re: Water Quality using ORP readings

Post by Admin on Tue Nov 01, 2011 3:20 am

DaveB wrote:Hi Mio thanks for the origonal links which were most interesting. I too believed that green water was healthy for koi, but now wonder about the huge p.H swings associated with it, not to mention if there is any die off causing a drop in D.O. as it decompses. Your thoughts please


It depends upon the density of the Bloom Dave Twisted Evil which in turn is related to Nutrient content.... Phosphorous in particular and Nitrogen in general.

Secchi disks are used to determine turbidity brought about by said Blooms http://oas.uco.edu/01/papers/lfimple01.htm


Green Water along with quantities of the dreaded B-Weed is hazardous imho ...I have had PH Spikes close to 11with either .... not to mention the zillion predators it attracts which are aerobic consuming copious D.O.

It`s this `Foodweb` which supplements the diet /shades the water etc which lulls keepers into a false sense of security.

Stephen mentioned D.0 Values of 130% sats during the day but 39% D.O sats at dawn affraid those type crazy swings will be detrimental long term not forgetting when D.O drops PH tends to decline simultaneously triggering mass aerobic decomposing activity further depleting 02...

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Re: Water Quality using ORP readings

Post by DaveB on Tue Nov 01, 2011 6:40 am

Mio I am now glad that I leave one of my UVs on during the winter months, even with the covers on

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Re: Water Quality using ORP readings

Post by Admin on Wed Nov 02, 2011 1:06 am

DaveB wrote:Mio I am now glad that I leave one of my UVs on during the winter months, even with the covers on

Mine was never switched off Dave Smile and the instant the cover was removed a `Cyanobacteria` Bloom erupted over the following days ... then subsided gradually over time ....

This I believe contributed to delayed Bio-Maturity by competing for the in situ Nitrogen Species Twisted Evil





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