Aquatabs tablets dissolve in water & release hypochlorous acid (HOCl) and monosodiumcyanurate (a non-toxic biodegradable compound). HOCl is the biocidal agent. It has a similar structure to water and because of this, it is resisted less by the water and can penetrate the cell wall.
The HOCl biocidal agent is measured as available chlorine. 50% of this total available chlorine is actually present as “free” available chlorine, while the other 50% is “combined” in the form of mono– or dichloroisocyanurate
The ratio of “free” and “combined” available chlorine always remains at 50:50. This means that the solution continues to disinfect the water until the last drop.