/ by /   Pool Maintenance / 0 comments

The right parameters of the pool water

The fundamental qualities of water of swimming pools are the following :

  • Water must be clear
  • The water should be disinfected (curative action)
  • Water must be disinfected (preventive action)
  • The water should be non-aggressive
  • The water should be non-scale-forming.

These essential qualities will be obtained through 3 complementary actions :

  • Physical treatment: it is provided by your group filtration.
  • Chemical treatment: it allows to regulate the parameters of your pool water and to keep it healthy and balanced.
  • Control of the parameters of the water: analysis and correction.

Water is a living evolving environment. Your pool water should be tested regularly (at least once per week) since its parameters vary depending on the temperature of the water surrounding pollution and the number of bathers.
The first action is to know and adjust the balance of the water which depends on three parameters:




Parametres de l'eau de piscine

The first action is to know and adjust the balance of the water which depends on 3 parameters:


PH, or potential of hydrogen, is linked to the concentration of H + ions which represent the acidity of the water. The pH scale runs from 0 (very acidic: high concentration of H + ions) to 14 (very basic environment: low concentration of H + ions). Neutral pH is equivalent to 7. Swimming pool, the ideal pH is between 7 and 7.2.

The alkalinity of the water: TAC

Bicarbonate and carbonate richness is measured by the TAC (title Alcalimetrique full). The unit of measurement of this parameter is the ° F (French degree) or ppm (part per million) or mg/l. Note: 1 ° F = 10 ppm = 10 mg/l To ensure a power buffer sufficient pool water (the buffering capacity is its ability to absorb flunctuations in pH to the up and down), the value of the TAC must be between 10 and 30 ° F. If alkalinity is too low, the pH will undergo large fluctuations while if it is high, it will be difficult to bring the pH to its normal area of treatment.

The hardness of the water: TH

Measurement of the hardness of the water is called title hardness or TH. Just as the TAC, the unit of measure for this setting is ° F (French degree). The hardness of the water is a function of its content in Calcium and Magnesium ions. In the pool, considering that the ideal value of TH is between 10 ° F to 20 ° f
Water is too soft < 20 ° F scale-forming.
Water too hard < 20 ° F is corrosive.

Water is said to be balanced when the measured pH corresponds to the pH balance (for a TH and a TAC given, there is balance pH).
Different methods to determine the pH of balance. The use of the diagram of the Taylor balance which represents balance Calc (limestone) carbon dioxide (bicarbonate) of water at a temperature of 24 ° C given water is one of these methods.
This simplified water balance diagram determines the pH of balance from a TAC and a TH measured in the pool. If the PH measured in the pool does not match the pH balance, it should be moving closer by adjusting the TAC or TH. You will understand, the pH of your pool water measurement and its correction are mandatory actions to have a balanced water.



Partager cette page

Written by BPL International

Leave a Reply