Re: Chlorine v Salt laws

Swimming Pools in France

Chlorine v Salt laws

LorraineT 26/03/2008, 12:20
I read a year or so ago that new pools had to be salt by law, in France. Is this true or false?

Re: Chlorine v Salt laws

Cat 26/03/2008, 12:54
Where on earth did you read that Lorraine? False, without a shadow of a doubt.

Cathy

Sun, sun, sun, here it comes...

Re: Chlorine v Salt laws

Poolguy 26/03/2008, 13:42

Absolutely false.......!

The contrary would be more plausible due to European Directive on discharge of Pollution into the Environment.

Incidentally, it should be pointed out (again!) that salt electrolysis is the SAME as chlorine direct treatment - there is chlorine and Cyanuric acid in the water. The difference is 3500ppm (or more) of sodium chloride.

Andrew

www.Poolguy.fr

Re: Chlorine v Salt laws

Caussenarde 26/03/2008, 15:18
Groan...I've got that déja vu feeling all over again... Sad [:(]

Not the same.

An electrolyser cell is used to make hypochlorous acid, from the free chlorine ions delivered by the addition of salt.

The cell cannot produce cyanuric acid.

More detail extracted from an earlier post if it helps......but you can find this stuff on the WWW yourselves with little effort:

The electrolyser does in fact release HOCl (hypochlorous acid) into the pool....but it does not add any stabiliser (cyanuric acid) and it is this, that actually causes the smell and possible irritations associated with 'chlorine pools'. Cyanuric acid is in the chlorine tablets commonly used, but not in the chlorochoc tablets which have short life. The stablilsier is necessary to prevent the HOCl disappearing too quickly due to the action of sunlight.

Cyanuric acid is used as a stabilizer in recreational water treatment to minimize the decomposition of hypochlorous acid by sunlight in outdoor swimming pools and hot tubs. It achieves this by absorbing UV radiation.

Chlorinated derivatives of cyanuric acid, such as trichloro-s-triazinetrione and sodium dichloro-s-triazinetrione, are used as algacides or microbiocides in swimming pool water and large scale water systems in industry.

and:

What's the difference between a saltwater pool and a pool maintained with packaged chlorine?

Salt water pools used to be the exception, but now they are becoming a widely accepted method of water treatment in swimming pools. A lot of builders are now making salt water systems standard on their new pools. Most equipment manufacturers have also become aware of the fact that salt water pools are not just a passing fad. They are here to stay.

Lower Chlorine Levels -

Saltwater Pools - 0.5 to 1.0 ppm chlorine

Traditional Pools - 3.0 - 10.0 ppm chlorine

No "Chemical Bath" Feel

NO packaged chlorine needed.

NO algaecides needed

NO soda ash or baking soda

Better Swimmer Comfort

By eliminating the need for the harsh chemicals, you eliminate the source of the irritation that plagues swimmers in most pools.

Controlled Stabilizer Levels

If you are using chlorine tablets, you are adding 1 lb. of stabilizer for every 2 lbs. of tablets you put into your pool. Your stabilizer level rises to over 100 ppm and your chlorine becomes ineffective and yellow algae and poor sanitization results.

With a salt system, you add stabilizer as needed and are able to keep the level low. Your chlorine remains VERY effective and you need much less in the water to do the job (see above).

On commercial pools, state code requires you to drain pools when the stabilizer level exceeds 100 ppm. The salt system avoids this problem.

Superior Algae Control

Saltwater pool systems virtually eliminate algae problems. This is because the chlorine in the pool is not inhibited by high stabilizer levels.

Re: Chlorine v Salt laws

Poolguy 26/03/2008, 16:15
Cassernade.

I submit that there is next to no supportable science in the quotes you have posted. In the main you have promoted americanized commercial gobble-dee gook
If you really believe that it is correct then I will banter no further as it is the same argument as last year and the year before.

But a small for instance:
Cyanuric acid (stabiliser) is an additive, it is in powder form usually and is contained in the Gallets,(dichlorocyanurate de sodium) it is ALSO IN CHLOR CHOC (trichlorocyanurate de sodium) and it is also in some salt (stabilized salt- you can also buy unstablised salt). It is in now way contributing to the 'pool smell' that you refer too, which is actually chloramines - and oxidised, derivation of sodium hypo chloride. It is a must in pool water up to 50ppm as it not only protects the chlorine from UV but also enhances the disinfection qualities of chlorine.

Another for instance.
Never has anyone I know in the Pool industry recommend that a chlorine direct pool should be run between 3-10ppm, that is ludicrous and completely misleading to the point of danger to the public. The correct figure is 1.5ppm up to 2.5ppm if your pool is heated, above that is considered CHOC treatment and is not safe for swimming.

PLEASE check your sources for accuracy before you post, as there is little to gain from what is above, it does you no service.

Andrew

www.Poolguy.fr

Re: Chlorine v Salt laws

Caussenarde 26/03/2008, 17:53
Andrew

Maybe the penny has dropped.

I make little or no additions of cyanuric acid to my water, and I know that the electrolyser does not produce it, and I have been content with this (as above).

But would you say that this lack would be the cause of occasional algal blooms which occur easily after windy/dusty weather or thunder storms?

If so, what is the best method of adding cyanuric acid, via chlor choc?

On another note, the problem I have with the pool is the lack of metrics which I can map against pool conditions and I will be following up the quotation you have given me for the analyser, I think it will help a lot.

So, apologies. Smile [:)]

The only excuse I have is its raining again and my work is stopped as a result.

No more grumpy posts, honest.

Please note that any unsolicited advertising will be removed