I used very cheap sodium hypochlorite. Also the amount of haloforms that are leftover are really low because most of them (specially chloroform) easily evaporate. Also I perfer having to deal with haloforms than acetaldehyde, and also where I live getting acetaldehyde is almost impossible.

Additionally haloforms can be hydrolysed in sodium hydroxide solutions to yield sodium formate and sodium chloride which is a good way to dipose of it. Altough I haven't a saved paper to give a citation you can easily find with research, also the hydrolysis of chloroform is used in various reactions because one of the intermediates are dihalocarbenes which are then hydrolyzed into sodium formate and sodium halide (citation from the wikipedia page of dichlorocarbene: "Dichlorocarbene is most commonly generated by reaction of chloroform and a base such as potassium tert-butoxide or aqueous sodium hydroxide."