Swimming Pool Chemicals, Packaging Type: Drum, 25 kg

Destruction of microorganisms by chemical agents whose effectiveness is determined by concentration (manufacturers' dilution guidelines must be followed exactly to ensure effectiveness), shelf life (solutions must be used within a finite time after being made up), local environment (e.g. hard water, traces of contaminants [detergents, soap, organic or body tissue, cork, cellulose/cotton wool within the solution])