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Water hardness & pH-value in the whirlpool

Why should one consider the water hardness and the pH-value in the whirlpool?
The water hardness and the pH value are two very important parameters for successful water care in the whirlpool and are interrelated.

Carbon dioxide and pH increase

When you fill the whirlpool with water, heat it up and swirl it, the carbon dioxide is released. When it is outgassed, the water becomes more alkaline.

How to lower the pH value correctly

The pH value can be lowered easily or with difficulty with water of different hardness. How to lower the pH value correctly.

What is the pH value?

What exactly is the pH value and what is the ideal pH value for the whirlpool water?

The effect of Calcium Ex

Why put Calcium Ex in the water und what is the effect?

Softening water with Calc Down Pad

Why should the water be softened with Calc Down Pads?