﹡A filter medium consisting of porous ceramic pipes suitable for use in freshwater and saltwater aquariums.
﹡Double features filter medium,can be used as a mechanical prefilter medium for coarse particles or as a biological filter medium.As prefilter medium,protects the biological filter material from rapid silting
﹡The hollow structure provides ideal conditions for benficial bacteria,whilst at the same time allowing excellent rates of water-turnover.
﹡Highly efficient surface for beneficial bacteria to colonize.