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Around the water

Pool water treatment and pool cleaning

Fundamentals of swimming pool care

Pool water "lives" - because every day it is exposed to a wide variety of
elements. Inevitably inorganic and organic debris from swimmers and the environment are introduced to the water. To ensure pleasant bathing conditions, a physical and a chemical water treatment needs to be carried out. This will ensure that your pool water is visually and hygienically clean throughout the bathing season.

In this section you will find:

1. Physical water treatment: circulation and filtration of the pool water
2. Chemical water treatment: dosing of pool care products
3. Water hardness

Physical water treatment: circulation and filtration of the pool water

You should leave the filter pump running long enough to ensure that the total volume of pool water is circulated at least three times a day. On average, this corresponds to a filter running time of approximately six to eight hours per day.

Which filter is suitable for which pool?

For large outdoor or indoor pools (> 15 m┬│) two types of filters are suitable:

  • Sand filter: The most common filter type, very effective with the best price - performance ratio.
  • Cartridge filter: Easily rinsed with water, can be replaced. 

Chemical water treatment: dosing of pool care products

Water filtration alone can not eliminate all impurities. For this reason a treatment with the appropriate swimming pool chemicals is essential. In order to dose swimming pool chemicals correctly, you need to know the water volume of your pool in cubic meters.

To help calculating the amount of water in your pool, we have included a list of formulas for the most common pool shapes: 




Water hardness

Another important factor for a correct water treatment is the water hardness. The unit of measurement is mg/L of calcium carbonate. Water hardness differs from region to region - for further details please contact your local water authority.

Soft water with a pH level below 7.0 is considered acidic and can corrode metals and pool surfaces. Hard water with a pH level higher than 7.0 is considered alkaline. If the water hardness is above a certain level and the pH above 7.6, calcium deposits will occur. To prevent this from happening, apply Calcinex® to the pool water by following the dosing instructions on the product label.

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