The chemical equilibrium of the water
The water of the whirlpool will be clean and clear if its chemical components are in equilibrium.
1. pH-values:
The first important indicator is the pH value of the water. pH is measured in a scale between 0-14 where 7
is the neutral value. Below this level the water is acid, above it alkaline. The pH value of the human eye is
around 7.5, below 7.2 and above 7.8 the water will sting the eyes of the bather. Experiences have shown
that most problems are caused by a too high pH value. An improper value reduces the effect of the
disinfectant.
2. Water hardness:
Water hardness is determined by the quantity of calcium and magnesium salts dissolved in the water.
Hard waters contain too much of these dissolved salts and thus, left alone, scale will form. Scales can
cause significant damage both to the walls of the basin, to the piping, filter and to the heating and
engineering units. In Hungary waters are medium hard. Water hardness cannot be reduced by the addition
of chemicals, but the formation of scales can be prevented.
3. Disinfection:
Disinfectant: is the chemical that eliminates or neutralises the microorganisms (bacteria, algae, fungi,
viruses) present in the water. Microorganisms are small, microscopic organisms, which cannot be
detected with the naked eye and are continuously getting into the water through rain, wind and the body
of the bathers. If they are not eliminated they pass from one person to the other through the water (and
may cause sickness, infection). Organic matter turns the water of the basin opaque and cloudy. Most often
– as we are dealing with warm water basins – bromine or active oxygen is used.
4. Frothing:
Froth is the smaller-bigger agglomeration of the bubbles and colloid contaminants found on the surface of
the water. It is mostly caused by the mixing of the dirt, cosmetics, body care lotions, etc. that soak out of
the human skin and the chemicals. It endangers the conservation of the aesthetic appearance and
cleanliness of the water.
5. Water analysers:
There are several different types of water analysers, which are mostly used to measure chemical and
disinfectant effect. Chemical (pH); Disinfectant (Br, O
3
)
Types:
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Box containing tablets and graduated measuring glass.
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Litmus paper indicators in a box.
Replacing underwater light
1. Turn off thepower on the spa.
2. Remove plastic panel behind where the underwater light is situated.
3. There is a plug with two wires going into the back of the light.
4. Remove this plug by turning anticlockwise.
5. Replace faulty light globe with a new one.
6. Replace parts and put the plastic panel back on.
