LTWHOME Fine Filter Media Pads Suitable for Eheim Ecco Pro 130/200/300 Ecco 2232/2234/2236(Pack of 12) Approx size:150 mm diameter x 20 mm thickness Custom designed and manufactured for the Eheim Ecco Pro130/200/300 Ecco 2232/2234/2236 filtration systems Enhances biological filtration Provides efficient water flow with less clogging for long lasting filtration Good for freshwater and saltwater environments