A short term cartridge for the Eheim Pickup 45 to aid the removal of harmful chemicals. These Carbon cartridges are for adsorptive filtration and will aid the removal of harmful chemical substances (chlorine, residues of medications etc.). Ideally used during the start-up stage of the aquariums or after the aquarium has had treatment with medications. The filter cartridges should in any case only be used for a limited period (ca. 4 weeks) and then replaced with a standard cartridge.