EHEIM EHFIMECH (Hollow Ceramic Rings) 2L: A coarse mechanical filter material which is to be used as bottom layer filtering. Its hollow ceramic design creates eddies which disburse the water into many paths. It traps large debris while creating an even flow of water for subsequent layers.
Prefilter material made from hollow ceramic rings for trapping large dirt particles.
Hollow ceramic rings.
Easy to clean.
Suitable for fresh and marine water.
Mechanical: Yes, Biological: No, Absorptive: No, Chemical: No.