EcoPro filters are highly effective at absorbing chemicals in 1,200-1,500 litres of water (depending on the quality of the water at source) or during 3 months of water use in a normal household. After 3 months we recommend changing it even if you have not used the 1,200-1,500L. The reason is that filters become saturated with contaminants over time and there is a risk of bacterial growth after 3 months. This is normal for all activated carbon filters.
If the filter is used daily to consume 6 litres (3 persons, each drinking 2 litres/day), after three months, bacteria could start to proliferate in the filter. After three months, there will be a phenomenon called "Desorption" which is the opposite of filtration. For these two reasons, we estimate that the safest period of use for the cartridge is 3 months.
If you use the refill beyond these 3 months, the filtration efficiency of contaminants such as pesticides and herbicides, VOCs and microplastics will no longer meet our quality parameters.
In addition to the aspects mentioned in relation to adsorption and efficiency, you should bear in mind that activated carbon is a material of organic origin that can be a breeding ground for microorganisms, which over time can lead to the proliferation of bacteria.
This is a normal situation with organic materials such as activated carbon, regardless of how much you use the filter.