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To maintain the pH within the recommended range, you should use only a pH corrector (acidic or
alkaline) recommended by your pool specialist. For your convenience, you could install an
automatic pH regulation system. Warning : chlorine shock treatment, a brusque correction of the pH
value by adding acid or caustic soda through the skimmers, may trigger the alarm unnecessarily.
The filters and pre-filter must be clean and must comply with the manufacturer's specifications.
The stabiliser concentration should be less than 50 ppm. The purpose of the stabiliser, or
isocyanuric acid, is simply to protect the chlorine from the effects of UV radiation. If the
concentration is too high, it will interfere with the desinfectant action of the chlorine supplied by
the apparatus. Reduce the amount of stabiliser in your pool, following the recommendations of
your pool expert.
The concentration of free chlorine in the pool should be at least 1 ppm.
ATTENTION : The life of the electrode is closely linked to compliance with the indications
given above, especially as regards water temperature > 15°C, a stable pH value of 7.0-7.2, and
correct levels of TA, TH and stabiliser.
It is best to use water from the municipal water supply. Avoid water of natural origin
(rainwater, irrigation water, surface water, wells). If water of natural origin is used, you should have
it analysed before use, to ensure that it complies with health regulations as regards drinkability, and
apply a suitable treatment if necessary.
After checking the above 7 points :
We recommend you apply a shock treatment to the swimming pool water before using it.
Add enough salt to the pool to reach a concentrtion of 5 Kg/m
quality, in tablets or granular form, for example, a type recommended for water softeners. It is
not necessary to use stabilised salt.
Salinity table
3
VOLUME (m
SALT (Kg)
Chlorine efficiency
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
6.8
7.0
Source: French Ministry of Health
)
40
200
Efficacité du chlore
7.2
7.4
7.6
7.8
60
300
8.0
3
. The salt should be of edible
80
100
400
500
6
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