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❹ Preparing the pool
4.1 I Balancing the water
The water used must originate from a supply network compliant with Directi ve 98/83/EC on the quality of water intended
for human consumpti on. In order for the water to be treated opti mally, carry out measurements and adjust the values
in accordance with the following recommendati ons:
4.1.1 Seasonal analyses in "preparati on for re-use"
- Stabiliser (cyanuric acid) (<30 mg/L, ppm): the stabiliser protects chlorine from the destructi ve power of the sun's
U.V. rays. Excessive stabiliser can block the disinfecti ng power of chlorine and turn the water turbid.
±
- Metals (Cu, Fe, Mn) (
can cause permanent stains.
4.1.2 Monthly analyses
- TH (15-30°f) or (150 - 300 mg/L CaCO
and this value can vary signifi cantly depending on the geographical region concerned.
- TA (8-15°f) or (80 -150 mg/L CaCO
stabilised. It is important that the TA is adjusted before the pH.
4.1.3 Weekly analyses
- pH (7.0 - 7.4): the pH measures the acidity or alkalinity of the water. A pH in the range 7.0 to 7.4 helps to preserve
the pool equipment and maintain eff ecti ve disinfecti on. Taylor's balance method, as shown below, is used to
adjust the pH value:
Alcalinity of the water
Taylor's balance
- Free chlorine (0.5 - 2 mg/L or ppm): this quanti ty of free chlorine makes the water both disinfected and disinfecti ng.
Contact your retailer to determine the type of corrector product or automati c control appliance to
be used to adjust the values.
0 mg/L, ppm): metals damage the metallic parts of the pool (corrosion phenomenon) or
, ppm): the TH measures the water hardness (quanti ty of calcium carbonate),
3
, ppm): the TA measures the water alkalinity, and this value allows the pH to be
3
Hardness of the water
: Mark the value of the TH aft er
adjustment.
: Mark the value of the TA aft er
adjustment.
: Draw a line between the TH value
and the TA value to determine the pH
value to be adjusted.
EN
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