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Water Chemistry Training - page 3 / 16





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Water Balance

Water balance is extremely important to spas. Balanced water affects many different aspects of water chemistry.The main factors affected are water clarity, or pH bounce, spa damage.

Water balance consists of, Alkalinity, pH, Sanitation,Calcium Hardness, Total Dissolved Solids and Filtration

-Total Alkalinity  100 ppm  (80 to 120 ppm)

Total alkalinity is the measure of the amount of alkaline salts in the water, which give water the ability to resist changes in pH or buffer the water from wild pH swings.

-pH 7.5   (7.2 to 7.6 )

The term "pH" is a scale of measurement to tell us how acidic (corrosive) or basic (alkaline) the water is. It essentially ranges from 0 to 14, although the extremes of 0 or 14 are never experienced with pool water. pH of 7 is neutral, that is, the water is not acidic nor is it a base. The ideal range for a pool or hot tub is 7.4 - 7.6, slightly on the base side which assists with bather comfort, as the pH of the human eye is about 7.5..

-Sanitation  2.5 ppm   (1.5 to 3.5 chlorine)

A product the effectively kills allege and bacteria and other nitrogen based compounds Such as Chlorine, Bromine ect

-Calcium Hardness  200  (100-400)

Calcium Hardness a calcium level of 150ppm - 300ppm. Soft water is aggressive and will cause pitting and etching of concrete, grout or plastered surfaces as it seeks to dissolve calcium into the water from whatever contact source.

-Total Dissolved Solids (TDS)

Total dissolved solids (TDS) is a measure of how  well used the water has become more accurately it is a measure of the amount of dissolved matter in the water. High TDS (1,500 ppm and higher) can interfere with the sanitizer's ability to combat bacteria growth.


Filter turn over rates, water movement  and water circulation

are critical to maintain water clarity and control algae by continually getting

the sanitizer to all the water and surfaces  in the spa.

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