Aquatic facilities available for use by the public must ensure the bathing water contains an adequate level of a disinfection agent that can destroy any microorganisms that may be present.

Chlorine is by far the most common disinfection agent used in aquatic facilities. Chlorine has the advantage of being relatively low cost, and is an effective disinfectant agent at a pH that does not cause bather discomfort.

When sodium hypochlorite or calcium hypochlorite, is added to water, hypochlorous acid (HOCl) is formed. Hypochlorous acid exists in an equilibrium state in water; which means it partially dissociates to form a hydrogen ion, H+, and a hypochlorite ion, OCl- .
This is shown in the following chemical reaction:
HOCl ⇌ H+ + OCl-
Hypochlorous acid (Strong disinfectant) ⇌ Hydrogen ion + Hypochlorite ion (Weak disinfectant)

The balance changes with variations in pH. When pool water becomes more acidic (less than pH 7), the hydrogen ion concentration increases, they then combine with the hypochlorite ions and drive the equation to the left to form more hypochlorous acid.

When pool water becomes more alkaline (towards pH 8) the hydrogen ion concentration decreases. To make up for the shortage hydrogen ions split from the hypochlorous acid and the equation is driven to the right to form more hypochlorite ions. The concentration of hypochlorous acid will therefore decrease, and the disinfecting power is reduced because while hypochlorous acid is a strong disinfectant, the hypochlorite ion is only a weak disinfectant

Grander treatment overcomes this sensitivity to changes in pH by increasing the effectiveness of both species of Chlorine significantly, through increased solubility affecting surface contact and interaction time with available Chlorine.

In addition the treatment has direct bacteriological impacts, influencing the bacteriological environment and agents influencing disinfection.

This allows for a larger range of pH conditions to be successfully managed, whilst maintaining the stability of pool disinfection, without the need for Acid or Buffer.

In tests before and after Grander treatment a 2-3 fold increase in free Chlorine has been observed.

In real world conditions this relates to pools that can operate far more effectively than traditional pool within normal operating parameters, which can also operate outside the 7.2-7.8 pH disinfection window when required without any of the associated issues.