AquaClear 30/150 Foam Filter Inserts - 3 Pack - A1392 - Aquarium Filter Media

AquaClear 30 Foam Filter Insert is a mechanical filter media that effectively removes particles and debris from aquarium water. It also prevents particulate waste from prematurely clogging other media in the filter. Primarily a mechanical filtration media it also provides powerful biological filtration as friendly bacteria eventually grow inside its pore structure.