The EHEIM Activated carbon pad is a open-cell filter foam, fully impregnated with special activated carbon. The foam pad adsorbent to dissolved harmful substances, colorants as well as residues of medicaments. After a short period the carbon will lose its adsorptive power, then a filter pad must be used in the filter. The EHEIM activated carbon pad is suitbale for the external filters EHEIM professionel 3 2071, 2073 and 2075, also suitable for the external filter professonel 3e 2074. Package content: 3 pads. Original EHEIM no. 2628710