10
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 Surechlor 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.
MAINTAINING SALT LEVELS
Before attempting to add salt to your pool ensure that the cell is clean. Then, with the
filter and cell operating, the Salt Test should be pressed and the reading on the Output
Monitor noted.
If this reading indicates the level of salt is too low it must then be increased. This will
normally be required about 4 times a year on average domestic pools but will vary
depending on the type of filtration, climatic conditions, etc.
Note: Higher salt levels are recommended in hot weather conditions where
maximum chlorine production is needed. We suggest levels as high as 8000 mg/l (ppm)
in these situations.
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