CX Chlorinator - Salt and Mineral Operation MANUAL
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8.3 pH
Measurement Interval: Once a week
Ideal pH Levels:
Concrete Pools: 7.4 - 7.6
Fibreglass/Vinyl Pools: 7.0 - 7.2
A pH of 8.0 makes oxidization only about 26% effective which 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 wall of your pool.
When pH is high you can add Hydrochloric Acid to lower the pH.
When pH is low you can add pH Increaser - sodium bicarbonate (soda ash) to increase the pH.
8.4 Total Alkalinity
Measurement Interval: Every 4-6 weeks
Ideal Total Alkalinity Levels:
Concrete Pools: 80 - 150ppm
Fibreglass/Vinyl Pools: 80 - 120ppm
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 Hydrochloric (a little at a time) to lower the Total Alkalinity.
When Total Alkalinity is low you can add pH buffer - sodium bicarbonate to raise the Total Alkalinity.
8.5 Calcium Hardness
Measurement Interval: Every 3 months
Ideal Calcium Hardness Levels
Concrete Pools: 250 - 300ppm
Fibreglass/Vinyl Pools: 150 - 190ppm
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.
8.6 Stabiliser
Measurement Interval: Every 4-6 weeks
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 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:
Only add chemical in the method and quantities as indicated on the packaging provided or advised by
your local pool Professional. Also, if in doubt of any results you achieve then do not hesitate to consult
with your local pool Professional.
