What is the Significance of PH and Alkalinity in Pools

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What is the Significance of pH and Alkalinity in
Pools
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What is pH?
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The pH stands for potential of hydrogen and is
the measure of how many hydrogen (H) ions are
present in water.
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The pH is measured using the pH scale where 7 is
neutral, 0 is the most acidic, and 14 is the most
basic or alkaline.
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The pH scale is logarithmic and not linear which
means that as you go from one number to the next
you increase or decrease acidity by a factor of
10 and not one.
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What is alkalinity?
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Total alkalinity of water is a measurement of
how much acid the water can neutralize without
changing the pH.
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As things are added to the water that could
raise or lower its pH, alkalinity will act as a
buffer and prevent sudden shifts in pH.
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The higher the ppm (parts per million), the more
buffering ability the water has, and the less the
pH will be affected by highly acidic or basic
substances
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Effect of pH in pools
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There are four main things that pH will affect
- bather comfort, - water clarity, -
chlorine efficiency, - and the longevity
of the equipment.
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Water with a pH of less than 7 will result in
wear out of equipment and water with a pH of more
than 7.8 can become cloudy, cause scaling on
surfaces of pools and reduce chlorine's
effectiveness
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By keeping the pH in the ideal range of 7.4-7.6
you will greatly reduce the red, irritated
feeling eyes that many people experience when
swimming in unbalanced pools.
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Effect of alkalinity in pools
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The ideal range for total alkalinity is between
80-150ppm in pools, depending on the type of the
pool.
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Water with an alkalinity less than 80ppm won't be
able to buffer acids well, leading to rapid
fluctuations in pH and with an alkalinity higher
than 150ppm, the water buffers more.
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The pH of the water will raise despite pH
reducers being added to the water, which can lead
to the discomfort, cloudy water, chlorine
inefficiency, and scaling.
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Best practices
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Always adjust alkalinity before pH and wait
between 2-3hrs for a pool after adjusting
alkalinity before adding any other chemicals.
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A balanced pH in the pool keeps your chlorine
working effectively, keeping your water clear and
getting a longer life from your equipment.
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