So you want a chlorine free pool?
You have heard so many bad things about chlorine and the environment...
how chlorine burns the eyes, causes itching skin and respiratory ailments...
You don't know, what you don't know
The "negative effects" of chlorine are spread by Suzy's mom down the street, the lady at the beauty parlor and even your pediatrician... all people who mean well, but do not understand the science of swimming pool water chemistry.
Over the years,
this misinformation has compounded itself - to the point where businessmen have seized upon this "the sky is falling"mentality and introduced "chlorine free pools.
Skin rashes, respiratory ailments & burning eyes
The facts are plain & simple: it is not the chlorine that causes bather discomfort. It is almost always from
other water chemistry issues, and almost always due to the lack of
proper chemical maintenance, testing, and the incorrect dosing of chemicals.
Among the most common complaints:
itchy skin (too
little chlorine)
burning eyes (bad pH or too little chlorine - ammonia compounds)
green
hair (excess copper)
All of these are attributed to other factors... but
ignorant people immediately point their finger at the chlorine - because
they "smell" what to them must be chlorine (but are actually
chloramines).
People sense the strong "chlorine" smell around a commercial or indoor pool, or worse yet, a health club spa - and immediately assume that there is too much chlorine
in the pool!
What you are really smelling is actually resulting from
the
LACK OF CHLORINE! You are smelling the
chloramines off gassing. Chloramines are ammonia compounds that are formed when chlorine combines with bather waste. When there is a sufficient quantity of chlorine in the water chloramines cannot form. When the bather load exceeds the quantity or feed rate of the chlorine, chloramines begin to form.
This is why you "smell chlorine" on your skin after swimming - but in reality, you are actually smelling your
perspiration that has combined with the pool's chlorine that formed
chloramines (ammonia compounds) on your skin! A simple shower with soap & water will remove them.
As "Chlorine Free" as you'll ever get
The
only real "new"technology is ozone (though it has been around for 30+
years). Done properly with sufficient contact time before re-entering
the pool or spa - it has awesome effects on the water quality. Ozone
works
synergistically
with the chlorine, taking over the business of oxidizing bather waste.
Since ozone is a thousands times better oxidizer than halogens (such as
chlorine, bromine, hydrogen peroxide), it takes over those
responsibilities,
allowing the halogens to work as sanitizers. The ozone will also kill
biological pathogens & viruses, which ionizers will not.
I
have personally been toying with ozone for over 18 years. I have 2
separate systems on my personal pool, plumbed into the filtration
& vanishing edge systems. I have tweaked my own contact
chambers & ozone destruct units to provide additional contact
time & to be more effective.
Chlorine is Safe
THERE IS ABSOLUTELY NOTHING WRONG WITH USING LIQUID CHLORINE. To be politically correct &
environmentally
sensitive, we call it "bleach." Chlorine has been used as a pool
sanitizer for over 100+ years. It is used to treat drinking water in
almost every city in the world. It is used in almost every commercial
swimming pool in the world to maintain clear, safe, and sanitary water.
People who do not understand how chlorine reacts with
contaminants,
heavy metals, and other chemicals, continue to spread myths about what
chlorine does & does not do.
For example:
Chlorine does not turn hair
green, but copper does (blue staining from copper + yellow (blonde) hair = green).
You cannot smell it around a pool, even at
3-5X the normal dosages, but you can smell
chloramines (which are the result of
too little chlorine).
At the correct levels (1-3 ppm) it does not burn the eyes, but incorrect pH or
chloramines will!
When water containing chlorine must be dumped into a storm drain or sanitary sewer, the chlorine can be neutralized - heavy metals from ionizers cannot!
People who claim that they are "allergic" to chlorine, in almost every case are really
experiencing reactions to the
chloramines - which can cause itching & rashes.
Someone
experiencing "allergic reactions to chlorine" (actually the ammonia compounds/
chloramines), could
additionally be
experiencing an allergic reaction(s) to any of the countless biological
contaminants that accumulate in a pool (or worse yet, a spa) when the chlorine levels drop too low:
- Molluscipox virus.
- Mycobacterium spp.
- Verrucas.
- Staphylococius aureus.
- Cryptosporidium.
- Leptospira interrogans.
- Trichophyton spp.
- E. Coli
- Pseudonomas
- Human pathogens: blood, saliva, feces, urine, perspiration, mucus
- Epidmerophyton.
- Acanthamoeba spp.
- Human papilloma virus.
- Legionella pneumophila
In asthmatics the inhalation of
chloramines can aggravate asthmatic symptoms. But because
chlormaines "
smell like chlorine," patients report that the
chlorine caused the asthmatic attack. Their doctor, not knowing about chloramines, reinforces the myth, and the MYTH GROWS.
Carcinogen
Additionally, alternative treatment
manufacturer's and
environmentalists point to the fact that chlorine is a carcinogen. Yes it is, but if the studies are
investigated, one will note that the prolonged exposure, dosage quantities, and chemical
concentrations
of chlorine are way beyond what any normal human being will ever ingest
over many lifetimes.
Again, it is the "chicken little syndrome" - "the
sky is falling, the sky is falling..." Did you know that ingesting too
much water, too quickly, can kill you??? Does that mean that we should
outlaw the drinking of water??? Of course not, but in moderation, the
exposure is more than acceptable.
The Secret is Even & Consistent Micro-Dosing
Depending
on the scope of the project & chlorine needs, we use barrels to
store liquid bleach that is delivered. Where large quantities are
needed, say for example on Olympic sized swimming pools, we'll install
an on-site
electrolytic production. The
electrolytic production also creates sodium hydroxide, which is collected for use in buffering the pH.
On
site production doesn't always generate enough sodium hydroxide, so pH
buffering is augmented with either C02 gas (it forms carbonic acid when
injected to the pool water) or a 4:1
muriatic
acid solution (4 parts water:1 part acid). At this ratio, the "boiling
point" (vapor point) of the acid is reduced, so that caustic fumes are not generated. As an added precaution, the chlorine & acid barrel bung
openings are kept sealed & barrels are vented to the outdoors
with a 1/4" vent tube.
For water chemistry management and to provide an automatic & instantaneous
responses to the demands for additional (or fewer) chemicals (due to 30
kids in the pool, a 100ºF+ heat spell, or a cool weather front), my
preference is an automatic ORP/pH controller (CAT Controllers & Acutrol
are my 2 brands of preference). It monitors the water, responding to
the additional demands placed upon the pool by the environment or
bathers, by controlling 2 fixed rate peristaltic pumps (Stenner
is my brand of preference)- delivering chlorine & the 4:1 acid
solution.
A water chemistry monitoring system coupled with slightly over-sized ozone system, will provide you with as
close to a chemical free pool as is humanly possible.
Paolo Benedetti - Aquatic Artist
"Creating water as art."™
Aquatic Technology Pool and Spa
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