Davey SP500 Series SPAPOWER CONTROLLERS - Manual (Page 4)

7
SPA WAteR tReAtmeNt
Recommended Chemical Values
Chlorine.......................... 1.5 - 3.0 PPM (Parts Per Million)
pH................................... 7.4 - 7.6
Total alkalinity................. 100 - 120 PPM
It is important to maintain your spa water chemistry to the above values to ensure a
healthy experience both for you as bathers & for your spa pool equipment.
PH
This is a measure of how acid or alkaline the spa water is (below 7.0 is acid, above 7.0 is
alkaline). Low pH will cause corrosion of any metalwork in the water (element, thermostat
pockets). High pH will cause scale formation & cloudy water.
total Alkalinity
This is a measure of how resistant your spa water is to change of pH. A low TA (0 - 80 ppm)
will allow the pH to fluctuate rapidly normally to the acid end & will make it very hard to correct
the pH back to the ideal range.
Chlorine
Levels of sanitiser are important to prevent the build up of bacteria & algae in the pool water.
Chlorine is not the only sanitiser available to do this. Other sanitisers are Bromine & Ozone.
Damage to the element, thermostat pockets & associated metalwork due to the poor
maintenance of water chemistry is not covered by warranty.