Balanced water is based on 3 parameters: pH, alkalinity (TAC) and hardness (TH).

It guarantees the optimal efficiency of the chemical products, the preservation of the equipments and a perfect water quality.

 

Water balance depends on the use of your spa

Depending on the location of your spa (outdoor or indoor), the number of people who use the spa and the frequency of use, the quality of the water is affected.

Therefore, you need to adjust the number of pH, TAC and TH tests (at least twice a month) and observe a very regular monitoring of your spa water. The need for treatment and the amount of chemicals used are directly related to the frequency of bathing.

Finally, regular maintenance and quarterly draining of your spa are essential to the preservation of your equipment as well as the quality of the water. Our tips for cleaning your spa.

Optimal measurement indices

If the water balance varies according to the use of your spa, here are some reference measurements:

  • pH (disinfection): Ideally, your spa water should be neutral around a value of 7.4 which is the optimal value for disinfecting your water. However, between 6 and 9, there is no need to rush to your dealer or to add products in quantity. All about pH. 
  • The TAC (alkalinity) allows to know the concentration of carbonate and bicarbonate ions.  This measurement indicates the capacity of the water to absorb pH fluctuations and to stabilize it.  The unit of measurement of the TAC level is the ppm (part per million) or the French degree (°f) and should be between 80 and 120 mg/l. By regulating the TAC level of your water (TAC+ or TAC-) you can do what is called “buffering your water”. All about alkalinity.
  • tH (hardness): The tH corresponds to the hardness of the water, which designates its concentration of limestone (it is then called the rate of alkalinity of the water) . It is measured in French degrees (°F) and is ideal between 10 and 20°F (or 200 mg/l or ppm). The higher the tH, the harder the water, i.e. the more calcareous it is. On the other hand, the lower the tH, the softer the water. All about water hardness.

 

NOT A GOOD IDEA

You may have heard of the Taylor scale, a diagram that checks the balance of water. This is an excellent rule of thumb, which  is only valid in water at 24°C (75°F). So it’s not a good idea to use this rule to measure the water balance for your spa.

ICO Spa analyzes water 24/7

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Free ICO app to access measurement data, personalized treatment recommendations and many unique features such as the Water Index (bathing index), the sharing function, …

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