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15.2 pH AND TOTAL ALKALINITY
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 pool. Correct pH levels are as follows; Fibreglass – 7.2 to 7.4;
Concrete & tiled – 7.4 to 7.6 If you allow the pH level to rise to 8.0 or above, the chlorine required could be
as much as three times the normal amount, in order to correctly sanitise the pool.
Total Alkalinity should not be confused with pH. Although the two are closely related, Total Alkalinity determines
the speed and ease of pH change. The ideal range is 80 – 150 ppm or, refer to your pool professional.
You should use a test kit which includes a test for Total Alkalinity. Low Total Alkalinity can cause unstable pH
levels. An inability to keep the pH constant may cause staining, etching and corrosion of metals. High Total
Alkalinity will cause constantly high pH levels and tends to encourage Calcium scaling.
15.3 TDS LEVELS
WARNING: Some people recommend that you put salt directly in the skimmer box.
This is a poor practice as it allows very high concentrations of salt to be passed
through your ltration and other pool equipment.
Salt is the essential element by which your ChloroMatic Nipper operates with. Insufficient Salt will damage your cell.
RECOMMENDED SALT LEVEL RANGE
Nipper model Operating salt level Add salt alarm
DNP15CLS, DNP25CLS 1,500 – 6,000ppm ~ 1,500ppm
DNP15C, DNP25C, DNP35C 3,000 – 6,000ppm ~ 3,000ppm
WARNING: Do not add Hydrogen Peroxide to pool water or through swimming pool hydraulic,
or sanitiser system. Use of Hydrogen Peroxide will void warranty on Davey products.
Salt is NOT used up in the chlorination process, or by evaporation. It is only lost through dilution caused
from: backwashing, splash-out, overflow, leakage from the pool, or plumbing. Heavy rain can dilute the salt
levels in your pool therefore, salt levels should be checked during these events.
Low salt levels will destroy the coating on the cell plates and will void all Warranty.
The ChloroMatic Nipper has a built-in warning indicator to minimise damage resulting from insufficient salt
levels however, the ultimate responsibility is on the owner to ensure adequate salt levels are maintained all
year round.
15.4. RUNNING TIMES
These instructions cover Nipper for residential use only.
If you run your Sanitiser on maximum output for, 24 hours a day, or for longer periods, the cell life will be
greatly reduced. It is important that the correct model ChloroMatic Nipper has been installed on your pool.
Many models are available from Davey to cope with small courtyard pools up to commercial size pools.
(Consult your local Nipper Dealer for more information).
Note: The ChloroMatic Nipper warranty does not apply to commercial or semi-commercial applications,
i.e. where the pool chlorine demand is far in excess of a typical residential pool.
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