Pool Pro CPP Series Installation & Operating Instructions Manual page 13

7. WATER CHEMISTRY
7.3pH
Ideal pH Levels: • Concrete Pools: 7.4- 7.6
A pH of 8.0 makes your chlorine only about 26% efficient so that is why it is critical to keep
your pH in range.
A correct pH level must be maintained to prevent problems such as black spot, staining,
cloudy water, etc. An incorrect pH level can damage the surface finish and walls of your pool.
• When pH is high you can add Pool Pro Hydrochloric Acid to lower the pH.
• When pH is low you can add Pool Pro pH Increaser - sodium carbonate (soda ash) to
increase the pH.
7.4 Total Alkalinity
Ideal Total Alkalinity Levels: • Concrete Pools: 80- lSOppm
Total Alkalinity should not be confused with pH, although the two are closely related. Total
Alkalinity determines the speed and ease of pH change, it is measured in ppm. You should
use a test kit which includes a test for Total Alkalinity. Low Total Alkalinity can cause unstable
pH levels. This causes an inability to keep the pH constant and may cause staining, etching
and corrosion of metals. High Total Alkalinity will cause constantly high pH levels.
• When Total Alkalinity is high you can add Pool Pro Hydrochloric Acid (a little at a time) to
lower the Total Alkalinity.
• When Total Alkalinity is low you can add Pool Pro pH Buffer - sodium bicarbonate
(buffer/baking soda) to raise the Total Alkalinity.
7.5 Calcium Hardness
Ideal Calcium Hardness Levels: • Concrete Pools: 250 -300ppm
In addition to pH and Total Alkalinity, Calcium Hardness must be kept in balance so that your
pool water does not become too corrosive or end up scaling the surface of your pool. These
are symptoms of swimming pool water that is unbalanced.
7.6 Stabiliser
Ideal Stabiliser Levels: 30-70ppm
The importance of pool Stabiliser cannot be over emphasised. It is essential in helping retain
chlorine in your pool. Chlorine is rapidly dissipated by sunlight and the use of Pool Pro Stabiliser
will reduce this dissipation dramatically. Without Stabiliser, it may be necessary to run the unit
for longer hours.
THE MOST IMPORTANT NOTICE AND WARNING
A
Only add chemical in the method and quantities as indicated on the packaging provided
or advised by your local Pool Pro Professional. Also, if in doubt of any results you achieve then
do not hesitate to consult with your local Pool Pro Professional.
• Fibreglass/Vinyl Pools: 7.0-7.2
Measurement Interval: Every 4- 6 weeks
• Fibreglass/Vinyl Pools: 80 -120ppm
• Fibreglass/Vinyl Pools: 150-190ppm
Measurement Interval: Every 4- 6 weeks
Measurement Interval: Once a week
Measurement Interval: Every 3 months
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