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Balancing the Water of
Your Spa
pH | Alkalinity | Calcium
Hardness
Water balance is important to
the overall performance of your spa. No
spa's water conditions are exactly alike.
The water source, location of the spa and
frequency of use all affect the water
balance. Unbalanced water can damage the
equipment, make the water uncomfortable
for the user, and decrease the
effectiveness of the disinfectant. Total
alkalinity, pH, and calcium hardness must
be within the correct range to balance
the water.
pH:
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Simply, pH is a scale indicating
whether spa water is acidic,
neutral or alkaline. Spa water
should be in the range of 7.2-7.6.
- A low pH below 7.2
leads to corrosion of spa
equipment and will eritate the
skin of the bathers. The
sanitizer will dissipate more
rapidly. A low pH can be
corrected by adding pH Up.
- A high pH above 7.6 promotes
scaling on heat exchange tubes,
creates cloudy water, calcium
deposits and reduces the
effectiveness of disinfecting
agents. A high pH can be
corrected by adding pH Down. |
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Alkalinity:
Total
alkalinity is a measure of the
alkalines in the water. They act
as a pH buffer or a pH stabilizer
preventing large changes in the
pH. The total alkalinity should
be 80-150 p.p.m.;
ideally 120 p.p.m. Chlorine and
Bromine tablets tend to gradually
lower the alkalinity level.
| A low total
alkalinity causes: |
- the pH to wander
- corrosive water
- disinfectants to
be ineffective
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| To raise the
total alkalinity add Spa Alk. |
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| A high total
alkalinity causes: |
- cloudy water
- scale formation
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| To lower the
total alkalinity add pH Down. |
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Add pH
Down |
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Add Spa Alk |
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Calcium
Hardness:
Calcium
hardness is the hardness present
due to dissolved calcium. The
desired range is 150-280
p.p.m.
| A low calcium
hardness causes: |
- corrosive water
- staining of
surfaces
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| To raise calcium
hardness add Spa Cal. |
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| A high calcium
hardness causes: |
- scaling of
heating pipes
- cloudy water
- staining of spa
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| To correct this
problem add Stain
Prevent.
Do not fill the spa with
soft water! |
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Add Stain
Prevent |
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| Add Spa Cal |
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