This is an AquaClear Activated Carbon Filter Replacement Pack (A597) for the AquaClear 20 Aquarium Filter System (A595). AquaClear activated carbon filter packs are used as the Stage 2 chemical filter media in the AquaClear 20 Power Filter System.
This AquaClear carbon filter replacement for the AquaClear 20 Aquarium Filter uses activated carbon to filter chemicals and absorb unwanted odors, discolorations, and other impurities. AquaClear carbon filters further reduce the amount of particulate matter in your aquarium to help your aquatic pets thrive better. They also reduce any remaining trace amounts of chlorine and improve water clarity.
AquaClear 20 carbon packs should be changed approximately every 2-4 weeks to better maintain water quality. This AquaClear activated carbon replacement filter pack is also known by Hagen part number A-597. It can be used in both freshwater and marine aquariums.