In Sydney Australia, most pools use salt water chlorinators and liquid chlorine to super chlorinate. No one I know buys uses or talks about bleach for swimming pools. Liquid chlorine is available from most pool shops and also from the two major "category killer" hardware chains, Bunnings and Masters. It is 125g/L available chlorine, present as sodium hypochlorite and generally comes in 12.5, 15 or 20 litre drums, often requiring a AUD10 deposit if you are not also returning the last drum. Liquid pool chlorine costs about AUD 1.25 per litre. eg Hy-Clor 12.5L Liquid Pool Chlorine I/N 3090252 | Bunnings Warehouse or FreeStyle Liquid Pool Chlorine 20L - Masters Home Improvement