Ideal Water Chemistry

A Note About Ideal Water Chemistry:

All of the chemical parameters listed below must be considered in relation to all the other parameters. All of these parameters work together as a system, none stand alone. For instance, to maintain good water balance indexes, low pH in pool water must be offset by a higher calcium hardness. High Total Alkalinity makes pH more difficult to change, but pH will rise a bit easier than it will go down when pool water has high TA levels. Chlorine is more effective (i.e. produces more HOCL and a higher ORP) at a lower pH, but the lower pH affects water balance. In a sense, there is really no "ideal" chemical level; there is only "ideal" results from a combination of the different parameters that produce safe, effectively sanitized pool water with a good ORP and non-damaging water balance.

Free Chlorine Range

Ideal Range = 2 ppm - 5 ppm

To increase: Add chlorine.

To decrease: Add sodium thiosulfate.



Ideal Range = 7.2 - 7.8

To increase: Add soda ash.

To decrease: Add muriatic acid, sodium bisulfate or CO2.


Total Alkalinty

Range = 60 ppm - 150 ppm

Ideal Range = sodium hypochlorite pools: 80-120 ppm TA; Cal Hypo pools: 60-80ppm

To Increase: Add sodium bicarbonate or CO2

To Decrease: Column pour muriatic acid or add sodium biosulfate


Calcium Hardness

Range = 150 ppm - 1000 ppm

Ideal Range = 500 - 800 ppm

To increase: Add calcium chloride.

To decrease: Dilute, dilute, dilute...


Cyanuric Acid/Chlorine Stabilizer

Range: 10 - 30 ppm

Ideal: 15 ppm

To Increase: Add granular cyanruic acid

To Decrease: Dilute, dilute, dilute...