The main reason for using a Can inline filter is protection against toxins. The inline filters are intended for indoor use and there is a chance that fungi, bacteria and pests could inadvertently enter the plants. These substances are spread through the habitat. This can have a negative effect on people's health. In particular, spores and aflatoxins from fungi (which you always have in a humid space) can be pathogenic in susceptible individuals. An inline filter prevents the spread of these.
