Eheim SUBSTRATpro Biological Filter Media - 1L Replacement Filters Improves the animal's perception of

Improves the animal's perception of its environment

Such resins can remove copper from freshwater but are ineffective in saltwater

Perfect for dogs who don’t like things going over their heads

Air-mesh fabric offers great breathability and comfort

Eheim SUBSTRATpro Biological Filter Media - 1L Replacement Filters Improves the animal's perception ofThis highly porous filter material is made of splintered glass, providing colonizable area and excellent conditions for purification bacteria. SUBSTRATpro utilizes unused volume in your filter, reducing peak nitrate loads and maintenance. Ideal for use with fresh or saltwater applications Washable and reusable