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Idiomas disponibles
Idiomas disponibles
Types of stain
Possible cause
Pink stains
These are generally found on seal parts and caused
by bacteria that grow on components of these plastic
parts and may be related to the water preparation.
If PHMB is used for disinfection in the presence of
copper, there is a risk of pink stains forming.
Yellow stains
These are generally found on seal parts and caused
by bacteria that grow on components of these plastic
parts and may be related to the water preparation.
If PHMB is used for disinfection in the presence of
copper, there is a risk of pink stains forming.
Presence of pollen or red algae, agricultural work,
greasy products (suntan lotion or cosmetics), organic
remnants (decomposition of plants) or dirt
some calcium compounds, which are used in
chemical products (pebble-shaped), tablets
When the water in the swimming pool is prepared
with bromine, it can cause stains (from yellow to
brown) due to the combination of a higher dosage
than the manufacturer recommendation and a pH
level lower than 6.9.
Shock disinfection with an oxidising agent can lead
to the formation of gas that burns the swimming pool
surface where it is not in contact with water.
WARNING: [Earthing the swimming pool promotes the corrosion of metal parts. When no electrical current reaches the swimming pool, no earthing is
a
needed - see DIN VDE 0100-702.]
WARNING: Calcium sequestering agents often contain phosphorus or phosphorous bonding agents that can cause or increase the growth of algae
and/or can affect measurements (of free chlorine, redox potential) with online devices. For this reason, when measuring with online systems, preference
should be given to ion exchangers and/or metal filters in the water line (before water runs into the pool).
Possible solution
In most cases these stains are irreversible.
It is important to react as soon as the stains appear. The swimming
pool manufacturer is to be informed and they will furnish information
about how to proceed, depending on the kind of stain.
GB/IE
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