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Controlling the pH of your pool is vital to the correct operation of the Enduro Chlor and
the effectiveness of the chlorine produced to kill algae and bacteria and the
comfort of bathers. Correct pH also effects the life of metals, cement products and
plaster finishes in the pool.
If a pH test indicates a low pH then add sodium bicarbonate (pH buffer) to raise the pH.
If the pH is high then add acid (hydrochloric or dry acid) to lower the pH.
Adding Acid
If the addition of acid is indicated, be careful not to add too much at one time as this
may destroy total alkalinity or cause harmful effects. We suggest you turn on the filter,
add the acid to water in a plastic watering can to dilute, then distribute evenly around
the pool away from walls, steps, etc.
TOTAL ALKALINITY
Check the Total Alkalinity at least once a month and maintain correct level for
proper pool water balance.
Total Alkalinity is a measure of the acid neutralising capacity of water which indicates
its ability to buffer (resist) changes in pH.
The addition of sodium bicarbonate will increase the level and acid will reduce it.
Measurements can be made with a 4 in 1 test kit.
Correct levels depend on other factors such as hardness, pH and temperature,
however the following levels can be used as a guide.
Concrete Pool — 150 to 250 mg/l
Fibreglass Pools — 80 to 100 mg/l max.
Vinyl Lined Pools — Above 100 mg/l
CYANURIC ACID STABILISER
Have a water sample tested at least every 4 months by your pool shop to determine
the level of Cyanuric Acid Stabiliser. It is most important that a level between 30 and
60 mg/l (ppm) be maintained in order for your Enduro-chlor to work efficiently during
Summer if your pool is outdoors.
CALCIUM HARDNESS
Calcium Hardness is a measure of the calcium compounds dissolved in the water.
Recommended levels should be as low as practical to minimise problems with
calcium deposits forming in the cell, therefore don’t add any further calcium
chloride (to raise hardness) or calcium hypochlorite (granular chlorine) to your pool
once the decision has been made to install saltwater chlorination.
Warning
Water supplies from bores/rivers/dams etc., can be high in mineral contaminants
resulting in poor chlorine production, therefore water may require additional
chemical treatment.
ALGAECIDES
Adherence to the above water chemistry recommendations should alleviate the need
to use algaecides in your pool.
PLR183 _Endchlor MAN-txt 17/7/06 12:20 PM Page 10
