These biocides serve slightly different purposes. Oxidizing biocides, like chlorine and ozone, work by disrupting cellular functions, leading to cell death in microorganisms. Non-oxidizing biocides, such as isothiazolone and quaternary ammonium compounds, typically work by binding to the cellular components of bacteria and algae, resulting in their inhibition. Both types are essential in a comprehensive water treatment strategy, ensuring broad-spectrum microbial control.