What is the difference between activated carbon and Ahlstrom™ refills?

Our standard refills with advanced 4-stage microfiltration activated carbon fiber are perfect for public tap water in terms of taste and filtration.

For use of BottlePro in areas where water is not suitable for drinking, we recommend the Ahlstrom™ filter, which removes 99.99% of pathogens. Due to the small pore size, the external filter has a slightly lower flow rate, requiring more suction.