JBL Cermec is a filter medium consisting of porous ceramic pipes suitable for use in freshwater and saltwater aquariums. JBL Cermec can be used as a mechanical prefilter medium for coarse particles or as a biological filter medium.
Actual product may vary from the image shown.
Actual product may vary from the image shown.
Overview
JBL Cermec is a filter medium consisting of porous ceramic pipes suitable for use in freshwater and saltwater aquariums. JBL Cermec can be used as a mechanical prefilter medium for coarse particles or as a biological filter medium. The hollow structure provides ideal conditions for beneficial bacteria, whilst at the same time allowing excellent rates of water-turnover.
Ceramic material frequently used for mechanical filtration. For use in fresh- and saltwater aquariums. As pre-filter medium, protects the biological filter material from rapid silting.
Markus H. at 03.01.2019: In my opinion these ceramic rings are just for mechanical filtration. I had them on the bottom (below the first media tray) of my JBL canister filter and they did their jod well. But I think these rings could be a little bit smaller.
