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Ross,

What effect will Ozone have on the cell, if the injection point is up stream of the cell?


Bill Tech II

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Bill Tech II

If it is UV, no worries. If it is CD the injection should be a good distance from the cell. CD injected close upstream from the cell can destroy the chlorine levels produced at the cell. Ross Townsend

Not just that, Ozone is so reactive that it will more than likely destroy the metals in the cell.

Thank you,

This system was installed by my areas "Best" builder...

Just to show you what can happen at the sales level in the front room...

There is an ozonenator, Frog and a salt system...

The are two pools on one system, lap and play pool. The lap pool will be heated, so while this is happening there will be no circulation in the play pool...

Bill Tech II

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Bill Tech II

This is a discussion I have been waiting for. I am getting conflicting information from two schools of thought.

One school says that high levels of ozone will cause the chlorine to form hydroxil radicals (chlorates?) and is a very strong oxidizer but not able to be stabilized with CYA.

This school also says to put the ozone up stream from the chlorine injection (or in the case of a Chlorine generator, the cell)because ozone is most effective within a few feet of the ozone injection point.

The other school of thought says they are simply not compatible and should not be used together.

Although I am undecided on the effectiveness of the two together, I am leaning towards 'compatibility' after reading Robert Lowry's book, POOL CHLORINATION FACTS. Robert Lowry does not address this directly but states that [chlorine generators]... can produce small amounts of ozone, chlorine dioxide, hydrogen peroxide, nascent oxygen, some peroxygen species and others". Robert also s

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Rick Bays

On 12/13/2005 6:26:33 AM, Rick Bays wrote:
>This is a discussion I have
>been waiting for. I am
>getting conflicting
>information from two schools
>of thought.
>
>One school says that high
>levels of ozone will cause the
>chlorine to form hydroxil
>radicals (chlorates?) and is a
>very strong oxidizer but not
>able to be stabilized with
>CYA.

It is not a school, it is a chemical reaction. Here are the facts.

In pool and spa water chlorine is present as HOCl and OCl-. The amount of each is dependant on the pH of the water but at pH 7.5 there ia about 50-50 of each. In 1984 Haag and Hoigne determined that ozone added to waters containing these species that ozone will NOT react with HOCl but will react with OCl- at a reasonable rate producing 77% chloride and 23% chlorate.

This means that if the concentration of chlorine is 2.0 ppm as UV-ozone is added, the half life of the ozone loss by reaction with OCl- is 15 min

That was a pretty interesting response. We are not all as educated on water chemistry facts as Mr Lowry so I am using this forum to learn more... going to 'school' so to speak. That is why I was framing the post as more of a debate rather than statements of facts. If I came off as being pompous or argumentative, I apologize.

I appreciate the information Mr. Lowry shared just not the tone. Apparently Mr. Lowry believes that since I am sales rep and not a scientist I have only ulterior motives in seeking a more thorough knowledge of the industry that I have worked in for over 35 years.

As a matter of rebuttal... I never implied that ozone could be stabilized with CYA but rather whether or not chlorates can be stabilized. (And possibly whether that even matters). I was told that ozone and chlorine formed chlorates and that chlorates could not be stabilized. I questioned the accuracy of the statement. Ergo, I asked the question on the WaterNet in an attempt to seek more expert opini

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Rick Bays

OK, I apologize too. But I did not say anything about your not being a scientist or any other background. You did attack me and my information and I responded. I am not sorry for that.

In the mean time, I have decided to not waste any more time on this discussion as it will only lead to more attacks and ignoring of the information I gave.

I hope you find the ozone information you seek. I do not now nor have I ever held any personal grudges against you Mr. Bays. But you apparently have some issues with me. I am leaving this board.

Bob

Don't leave Bob !!!

Why didnt they just install an equalizer between the 2 and work them both at the same time?

BOB PLEASE DO NOT LEAVE...........

Bill Tech II

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Bill Tech II

Wow. Seems to be an old post on a common problem.

If you want to release your ozone into the wilds of your main pool body, you had best keep the pH lower as opposed to higher or you will be tossing lots of chlorine in to keep a free residual.  Yet another good reason to make sure you use contact tanks. Also, like chlorine etc, Ozones usefulness is based on CT values a lot. This means a given ozone quantity in a given volume of water.

Will have to re-read the stabilizing part again I guess. Stabilizing Ozone = bad  We like it "Radical".

Sadly, Bob did leave us ............................