Our UVC products provide defence against germs and bacteria, including mould and dust mites - similar to bleach. What varies is the disinfection time. The products in our range have in-built timers for the sanitising cycle so the product operates a 'cycle of disinfection' e.g. the Pura bottle purifies the water in a 90 second cycle. Please refer to the product pages for more details on disinfection times and cycles.