Why use an ozonator when preparing food for the family? Most commercially grown fruit and vegetables are routinely sprayed with toxic agricultural pesticides. Then there's bacteria, which is present on all fruit and vegetables. Ozonators produce ozone, a natural biocide which effectively kills bacteria and viruses, and neutralises pesticide residues without leaving any hazardous chemicals. Ozone can also be effective in eliminating odours and mould in the house and car.